diff --git a/.luacheckrc b/.luacheckrc
index 2ba39e4..607a8d3 100644
--- a/.luacheckrc
+++ b/.luacheckrc
@@ -5,6 +5,7 @@ read_globals = {
 	"dump",
 	"ItemStack",
 	"pipeworks",
+	"unified_inventory",
 	"PseudoRandom",
 	"stairsplus",
 	"intllib",
diff --git a/api.lua b/api.lua
index 22175f9..28000d9 100644
--- a/api.lua
+++ b/api.lua
@@ -27,6 +27,7 @@ function microexpansion.register_oredef(ore, defs)
 
   for _,d in ipairs(defs) do
     d.ore = "microexpansion:"..ore
+    minetest.log("verbose", minetest.serialize(d))
     minetest.register_ore(d)
   end
 end
@@ -72,6 +73,13 @@ end
 
 -- [function] Register Node
 function microexpansion.register_node(itemstring, def)
+  if minetest.get_modpath("mcl_core") then
+    def._mcl_hardness = def._mcl_hardness or 3
+    def._mcl_blast_resistance = def._mcl_blast_resistance or 3
+    def._mcl_hardness = def._mcl_hardness or 3
+    def._mcl_silk_touch_drop = def._mcl_silk_touch_drop or true
+    def.groups.pickaxey = def.groups.pickaxey or 3
+  end
   -- Check if disabled
   if def.disabled == true then
     return
@@ -133,3 +141,44 @@ function microexpansion.update_node(pos,event)
     def.me_update(pos,node,ev)
   end
 end
+
+-- [function] Move items from inv to inv
+function microexpansion.move_inv(inv1, inv2, max, filter)
+  if max <= 0 then return end
+  local finv, tinv   = inv1.inv, inv2.inv
+  local fname, tname = inv1.name, inv2.name
+  local huge = inv2.huge
+  local inserted = 0
+
+  for _,v in ipairs(finv:get_list(fname) or {}) do
+    local left = max-inserted
+    if left <= 0 then
+      break;
+    end
+    if not v:is_empty() then
+      if v:get_count() > left then
+	v = v:peek_item(left)
+      end
+      if tinv and tinv:room_for_item(tname, v) and (not filter or not filter(v)) then
+	if huge then
+	  microexpansion.insert_item(v, tinv, tname)
+	  finv:remove_item(fname, v)
+        else
+	  --TODO: continue inserting from the same stack if it is bigger than max
+	  if v:get_count() > v:get_stack_max() then
+	    v = v:peek_item(v:get_stack_max())
+	  end
+	  local leftover = tinv:add_item(tname, v)
+	  finv:remove_item(fname, v)
+	  if leftover and not(leftover:is_empty()) then
+	    microexpansion.log("leftover items when transferring inventory","warning")
+	    finv:add_item(fname, leftover)
+	  end
+	end
+	inserted = inserted + v:get_count()
+      end
+    end
+  end
+  return inserted
+end
+
diff --git a/depends.txt b/depends.txt
index d3f04d8..96b6770 100644
--- a/depends.txt
+++ b/depends.txt
@@ -1,2 +1,3 @@
 default
 pipeworks?
+basic_materials?
diff --git a/init.lua b/init.lua
index e50a3af..790423a 100644
--- a/init.lua
+++ b/init.lua
@@ -11,15 +11,18 @@ microexpansion.gui_bg = "bgcolor[#080808BB;true]background[5,5;1,1;gui_formbg.pn
 microexpansion.gui_slots = "listcolors[#00000069;#5A5A5A;#141318;#30434C;#FFF]"
 
 microexpansion.settings = {
-	huge_stacks = minetest.settings:get_bool("microexpansion_huge_stacks")
+  huge_stacks = minetest.settings:get_bool("microexpansion_huge_stacks"),
+  simple_craft = minetest.settings:get_bool("microexpansion_simple_craft")
 }
 
+microexpansion.uinv_category_enabled = minetest.global_exists("unified_inventory") and unified_inventory.add_category_item and true or false
+
 -- logger
 function microexpansion.log(content, log_type)
-	assert(content, "microexpansion.log: missing content")
-	if not content then return false end
-	if log_type == nil then log_type = "action" end
-	minetest.log(log_type, "[MicroExpansion] "..content)
+  assert(content, "microexpansion.log: missing content")
+  if not content then return false end
+  if log_type == nil then log_type = "action" end
+  minetest.log(log_type, "[MicroExpansion] "..content)
 end
 
 -- Load API
@@ -37,45 +40,45 @@ local settings = Settings(modpath.."/modules.conf"):to_table()
 
 -- [function] Get module path
 function microexpansion.get_module_path(name)
-	local module_path = modpath.."/modules/"..name
+  local module_path = modpath.."/modules/"..name
 
   local handle = io.open(module_path.."/init.lua")
-	if handle then
-	  io.close(handle)
-		return module_path
-	end
+  if handle then
+    io.close(handle)
+    return module_path
+  end
 end
 
 -- [function] Load module (overrides modules.conf)
 function microexpansion.load_module(name)
-	if not loaded_modules[name] then
-		local module_path = microexpansion.get_module_path(name)
+  if not loaded_modules[name] then
+    local module_path = microexpansion.get_module_path(name)
 
-		if module_path then
-			dofile(module_path.."/init.lua")
-			loaded_modules[name] = true
-			return true
-		else
-			microexpansion.log("Invalid module \""..name.."\". The module either does not exist "..
-				"or is missing an init.lua file.", "error")
-		end
-	else
-		return true
-	end
+    if module_path then
+      dofile(module_path.."/init.lua")
+      loaded_modules[name] = true
+      return true
+    else
+      microexpansion.log("Invalid module \""..name.."\". The module either does not exist "..
+	"or is missing an init.lua file.", "error")
+    end
+  else
+    return true
+  end
 end
 
 -- [function] Require module (does not override modules.conf)
 function microexpansion.require_module(name)
-	if settings[name] then
-		microexpansion.log("loading module " .. name)
-		return microexpansion.load_module(name)
-	else
-		microexpansion.log("not loading module " .. name)
-	end
+  if settings[name] then
+    microexpansion.log("loading module " .. name)
+    return microexpansion.load_module(name)
+  else
+    microexpansion.log("not loading module " .. name)
+  end
 end
 
 for name,enabled in pairs(settings) do
-	if enabled ~= false then
-		microexpansion.load_module(name)
-	end
+  if enabled ~= false then
+    microexpansion.load_module(name)
+  end
 end
diff --git a/mod.conf b/mod.conf
index b1477c3..6a9a29e 100644
--- a/mod.conf
+++ b/mod.conf
@@ -1,4 +1,5 @@
 name = microexpansion
 description = A storage managing solution to get an overview over all your items.
-depends = default
-optional_depends = pipeworks, drawers, technic, technic_plus
+optional_depends = pipeworks,basic_materials,mcl_furnaces,mcl_core,drawers,technic,technic_plus
+supported_games = mineclone2,mineclonia,minetest_game 
+
diff --git a/modules.conf b/modules.conf
index 4f08c81..5374f54 100644
--- a/modules.conf
+++ b/modules.conf
@@ -1,5 +1,6 @@
-shared = true
 network = true
 power = false
 storage = true
 ores = true
+item_transfer = true
+crafting = true
diff --git a/modules/crafting/alternatives.lua b/modules/crafting/alternatives.lua
new file mode 100644
index 0000000..ae4f6a5
--- /dev/null
+++ b/modules/crafting/alternatives.lua
@@ -0,0 +1,37 @@
+---
+-- craftitems that offer alternative craft recipes
+
+local me = microexpansion
+
+--TODO: build specialized integrated circuits / chips out of the ic and other stuff that are required to build the devices / machines instead of the control unit being an alternative
+
+---
+-- [Microexpansion Control Unit]
+-- a different logic chip that uses gold, quartz and wood
+-- for use instead of basic_materials:ic that requires sand, coal and copper
+me.register_item("logic_chip", {
+  description = "Control Unit",
+  recipe = {
+    { 2,
+      {
+        {"basic_materials:gold_wire"},
+        {"basic_materials:silicon"},
+        {"basic_materials:plastic_sheet"}
+      },
+    },
+    { 2,
+      {
+        {"basic_materials:gold_wire"},
+        {"microexpansion:quartz_crystal"},
+        {"basic_materials:plastic_sheet"}
+      },
+    },
+    { 2, 
+      {
+        {"microexpansion:gold_wire"},
+        {"microexpansion:quartz_crystal"},
+        {"group:wood"}
+      },
+    },
+  },
+})
diff --git a/modules/crafting/init.lua b/modules/crafting/init.lua
new file mode 100644
index 0000000..c9146dc
--- /dev/null
+++ b/modules/crafting/init.lua
@@ -0,0 +1,8 @@
+local module_path = microexpansion.get_module_path("crafting")
+
+-- basic_materials replacements
+dofile(module_path.."/materials.lua")
+-- shared items used for various machine recipes
+dofile(module_path.."/shared.lua")
+-- items that allow for alternative recipes
+dofile(module_path.."/alternatives.lua")
diff --git a/modules/crafting/materials.lua b/modules/crafting/materials.lua
new file mode 100644
index 0000000..842114c
--- /dev/null
+++ b/modules/crafting/materials.lua
@@ -0,0 +1,32 @@
+---
+-- Craft materials, that are normally registered by basic_materials
+
+local me = microexpansion
+local substitute_basic_materials = microexpansion.settings.simple_craft == true or not minetest.get_modpath("basic_materials")
+local gold_wire_recipe
+
+if minetest.get_modpath("mcl_core") then
+  gold_wire_recipe = {
+    { 2, {
+        {"mcl_core:gold_ingot", "mcl_core:stick"},
+        {"mcl_core:stick", ""}
+      },
+    },
+  }
+else
+  gold_wire_recipe = {
+    { 2, {
+        {"default:gold_ingot", "default:stick"},
+        {"default:stick", ""}
+      },
+    },
+  }
+
+end
+
+-- [register item] Gold Wire
+me.register_item("gold_wire", {
+  description = "Gold Wire",
+  groups = { wire = 1 },
+  recipe = substitute_basic_materials and gold_wire_recipe or nil,
+})
diff --git a/modules/crafting/shared.lua b/modules/crafting/shared.lua
new file mode 100644
index 0000000..f718043
--- /dev/null
+++ b/modules/crafting/shared.lua
@@ -0,0 +1,53 @@
+-- crafting/shared.lua
+
+local me = microexpansion
+
+-- custom items that are used by multiple devices
+local steel_infused_obsidian_ingot_recipe, machine_casing_recipe
+
+if minetest.get_modpath("mcl_core") then
+  steel_infused_obsidian_ingot_recipe = {
+    { 2, {
+        { "mcl_core:iron_ingot", "mcl_core:obsidian", "mcl_core:iron_ingot" },
+      },
+    },
+  }
+  
+  machine_casing_recipe = {
+    { 1, {
+        {"mcl_core:iron_ingot", "mcl_core:iron_ingot", "mcl_core:iron_ingot"},
+        {"mcl_core:iron_ingot", "mcl_copper:copper_ingot", "mcl_core:iron_ingot"},
+        {"mcl_core:iron_ingot", "mcl_core:iron_ingot", "mcl_core:iron_ingot"},
+      },
+    },
+  }
+  
+else
+  steel_infused_obsidian_ingot_recipe = {
+    { 2, {
+        { "default:steel_ingot", "default:obsidian_shard", "default:steel_ingot" },
+      },
+    },
+  }
+
+  machine_casing_recipe = {
+    { 1, {
+        {"default:steel_ingot", "default:steel_ingot", "default:steel_ingot"},
+        {"default:steel_ingot", "default:copper_ingot", "default:steel_ingot"},
+        {"default:steel_ingot", "default:steel_ingot", "default:steel_ingot"},
+      },
+    },
+  }
+  
+end
+-- [register item] Steel Infused Obsidian Ingot
+me.register_item("steel_infused_obsidian_ingot", {
+  description = "Steel Infused Obsidian Ingot",
+  recipe = steel_infused_obsidian_ingot_recipe,
+})
+
+-- [register item] Machine Casing
+me.register_item("machine_casing", {
+  description = "Machine Casing",
+  recipe = machine_casing_recipe,
+})
diff --git a/modules/item_transfer/api.lua b/modules/item_transfer/api.lua
new file mode 100644
index 0000000..2259c1a
--- /dev/null
+++ b/modules/item_transfer/api.lua
@@ -0,0 +1,263 @@
+-- item_transfer/api.lua
+local me = microexpansion
+local item_transfer = {}
+me.item_transfer = item_transfer
+
+function item_transfer.get_output_inventory(pos,metadata,inventory)
+  local meta = metadata or minetest.get_meta(pos)
+  local inv = inventory or meta:get_inventory()
+  local lists = inv:get_lists()
+  if not lists then
+    return
+  elseif lists["dst"] then
+    return "dst", inv
+  elseif lists["main"] then
+    return "main", inv
+  end
+end
+
+function item_transfer.get_input_inventory(pos,metadata,inventory)
+  local meta = metadata or minetest.get_meta(pos)
+  local inv = inventory or meta:get_inventory()
+  local lists = inv:get_lists()
+  if not lists then
+    return
+  elseif lists["src"] then
+    return "src", inv
+  elseif lists["main"] then
+    return "main", inv
+  end
+end
+
+function microexpansion.vector_cross(a, b)
+  return {
+    x = a.y * b.z - a.z * b.y,
+    y = a.z * b.x - a.x * b.z,
+    z = a.x * b.y - a.y * b.x
+  }
+end
+
+function microexpansion.facedir_to_top_dir(facedir)
+  return ({[0] = {x =  0, y =  1, z =  0},
+                 {x =  0, y =  0, z =  1},
+                 {x =  0, y =  0, z = -1},
+                 {x =  1, y =  0, z =  0},
+                 {x = -1, y =  0, z =  0},
+                 {x =  0, y = -1, z =  0}})
+    [math.floor(facedir / 4)]
+end
+
+function microexpansion.facedir_to_right_dir(facedir)
+  return microexpansion.vector_cross(
+    microexpansion.facedir_to_top_dir(facedir),
+    minetest.facedir_to_dir(facedir)
+  )
+end
+
+function microexpansion.count_upgrades(inv)
+  local upgrades = {}
+  for i = 0, inv:get_size("upgrades") do
+    local stack = inv:get_stack("upgrades", i)
+    local item = stack:get_name()
+    if item == "microexpansion:upgrade_filter" then
+      upgrades.filter = (upgrades.filter or 0) + stack:get_count()
+    elseif item == "microexpansion:upgrade_bulk" then
+      upgrades.bulk = (upgrades.bulk or 0) + stack:get_count()
+    end
+  end
+  return upgrades
+end
+
+function item_transfer.update_timer_based(pos,_,ev)
+  if ev then
+    if ev.type ~= "disconnect"
+        and ev.type ~= "connect"
+        and ev.type ~= "construct" then
+      return
+    end
+  end
+  local meta = minetest.get_meta(pos)
+  if me.get_connected_network(pos) then
+    meta:set_string("infotext", "Network connected")
+    if not minetest.get_node_timer(pos):is_started() then
+      minetest.get_node_timer(pos):start(2)
+    end
+  else
+    meta:set_string("infotext", "No Network")
+    minetest.get_node_timer(pos):stop()
+  end
+end
+
+function item_transfer.setup_io_device(title, pos, metadata, inventory)
+  local meta = metadata or minetest.get_meta(pos)
+  local inv = inventory or meta:get_inventory()
+  local formspec = [[
+      formspec_version[2]
+      size[11,11]
+    ]] ..
+    microexpansion.gui_bg ..
+    microexpansion.gui_slots
+  if title then
+    formspec = formspec .. "label[9,0.5;"..title.."]"
+  end
+  local upgrades = me.count_upgrades(inv)
+  if upgrades.filter then
+    inv:set_size("filter", math.pow(2, upgrades.filter - 1))
+    formspec = formspec .. [[
+      label[0.5,0.75;filter]
+      list[context;filter;0.5,1;5,3]
+    ]]
+  else
+    inv:set_size("filter",0)
+  end
+  --TODO: target inventory dropdown
+  inv:set_size("upgrades", 4)
+  meta:set_string("formspec",
+    formspec ..
+    [[
+      label[8.5,2.5;upgrades]
+      list[context;upgrades;8,2.75;2,2]
+      list[current_player;main;0.5,5.5;8,1;]
+      list[current_player;main;0.5,7;8,3;8]
+      listring[current_name;upgrades]
+      listring[current_player;main]
+    ]])
+end
+
+local access_level = microexpansion.constants.security.access_levels
+local io_device_base = {
+  is_ground_content = false,
+  groups = { crumbly = 1, me_connect = 1  },
+  paramtype = "light",
+  paramtype2 = "facedir",
+  me_update = item_transfer.update_timer_based,
+  after_place_node = function(pos, placer)
+    if not placer then
+      return false
+    end
+    local name = placer:get_player_name()
+    local net,cp = me.get_connected_network(pos)
+    if net then
+      if net:get_access_level(name) < access_level.modify then
+        -- prevent placing exporters on a network that a player doesn't have access to
+        --Do we need to send a disconnect or stop any node timers?
+        minetest.remove_node(pos)
+        return true
+      else
+        return false
+      end
+    elseif minetest.is_protected(pos, name) then
+      minetest.record_protection_violation(pos, name)
+      --protection probably handles this itself
+      --minetest.remove_node(pos)
+      return true
+    end
+  end,
+  can_dig = function(pos, player)
+    if not player then
+      return false
+    end
+    local name = player:get_player_name()
+    local net,cp = me.get_connected_network(pos)
+    if net then
+      if net:get_access_level(name) < access_level.modify then
+        return false
+      end
+    elseif minetest.is_protected(pos, name) then
+        minetest.record_protection_violation(pos, name)
+        return false
+    end
+    local meta = minetest.get_meta(pos)
+    local inv = meta:get_inventory()
+    return inv:is_empty("upgrades")
+  end,
+  allow_metadata_inventory_put = function(pos, listname, _, stack, player)
+    local max_allowed = stack:get_count()
+    if listname == "upgrades" then
+      local item = stack:get_name()
+      if item == "microexpansion:upgrade_filter" then
+        local filter_upgrades = me.count_upgrades(minetest.get_meta(pos):get_inventory()).filter
+        if filter_upgrades then
+          max_allowed = math.max(0, math.min(stack:get_count(), 5 - filter_upgrades))
+        else
+          max_allowed = math.min(stack:get_count(), 5)
+        end
+      elseif item == "microexpansion:upgrade_bulk" then
+        local bulk_upgrades = me.count_upgrades(minetest.get_meta(pos):get_inventory()).bulk
+        if bulk_upgrades then
+          max_allowed = math.max(0, math.min(stack:get_count(), 10 - bulk_upgrades))
+        else
+          max_allowed = math.min(stack:get_count(), 10)
+        end
+      else
+        return 0
+      end
+    end
+    if not player then
+      return max_allowed
+    end
+    local name = player:get_player_name()
+    local net,cp = me.get_connected_network(pos)
+    if net then
+      if net:get_access_level(name) < access_level.modify then
+        return 0
+      end
+    elseif minetest.is_protected(pos, name) then
+      --minetest.record_protection_violation(pos, name)
+      return 0
+    end
+    if listname == "filter" then
+      local meta = minetest.get_meta(pos)
+      local inv = meta:get_inventory()
+      local filter = stack:peek_item()
+      if inv:room_for_item(listname,filter) and not inv:contains_item(listname, filter) then
+        inv:add_item(listname, filter)
+      end
+      return 0
+    else
+      return max_allowed
+    end
+  end,
+  allow_metadata_inventory_take = function(pos, listname, _, stack, player)
+    if not player then
+      return 0
+    end
+    local name = player:get_player_name()
+    local net,cp = me.get_connected_network(pos)
+    if net then
+      if net:get_access_level(name) < access_level.modify then
+        return 0
+      end
+    elseif minetest.is_protected(pos, name) then
+      --minetest.record_protection_violation(pos, name)
+      return 0
+    end
+    if listname == "filter" then
+      local meta = minetest.get_meta(pos)
+      local inv = meta:get_inventory()
+      inv:remove_item(listname, stack)
+      return 0
+    else
+      return stack:get_count()
+    end
+  end,
+  allow_metadata_inventory_move = function(pos, from_list, _, to_list, _, count, player)
+    --perhaps allow filtering for upgrades and removing filters in this way
+    if from_list ~= to_list then
+      return 0
+    end
+    return count
+  end,
+}
+
+function item_transfer.register_io_device(itemstring, def)
+  for k,v in pairs(io_device_base) do
+    if def[k] == nil then
+      def[k] = v
+    end
+  end
+  if not def.groups.me_connect then
+    def.groups.me_connect = 1 
+  end
+  microexpansion.register_node(itemstring, def)
+end
diff --git a/modules/item_transfer/exporter.lua b/modules/item_transfer/exporter.lua
new file mode 100644
index 0000000..609887b
--- /dev/null
+++ b/modules/item_transfer/exporter.lua
@@ -0,0 +1,93 @@
+-- microexpansion/machines.lua
+
+local me = microexpansion
+local item_transfer = me.item_transfer
+local access_level = microexpansion.constants.security.access_levels
+
+local function exporter_timer(pos, elapsed)
+  local net, cp = me.get_connected_network(pos)
+  if not net then
+    return false
+  end
+  local node = minetest.get_node(pos)
+  local target = vector.add(pos, microexpansion.facedir_to_right_dir(node.param2))
+  --TODO: allow setting list with control upgrade
+  --TODO: perhaps allow setting limits with control upgrade
+  local list, inv = item_transfer.get_input_inventory(target)
+  if list then
+    --TODO: move more with upgrades
+    local own_inv = minetest.get_meta(pos):get_inventory()
+    local upgrades = me.count_upgrades(own_inv)
+    local export_filter = upgrades.filter and function(stack)
+      return not own_inv:contains_item("filter",stack:peek_item())
+    end
+    local max_count = math.pow(2, upgrades.bulk or 0)
+    microexpansion.move_inv({inv=net:get_inventory(),name="main",huge=true}, {inv=inv,name=list}, max_count, export_filter)
+    --TODO: perhaps call allow_insert and on_insert callbacks
+  end
+  return true
+end
+
+-- [MicroExpansion Exporter] Register node
+item_transfer.register_io_device("exporter", {
+  description = "ME exporter",
+  usedfor = "Exports items from ME Networks into machines",
+  tiles = {
+    "exporter",
+    "exporter",
+    "interface",
+    "cable",
+    "microexpansion_exporter.png^[transform4",
+    "exporter",
+  },
+  drawtype = "nodebox",
+  node_box = {
+    --perhaps convert to connectable
+    type = "fixed",
+    fixed = {
+      {-0.5, -0.25, -0.25, 0.25,  0.25, 0.25},
+      {0.25, -0.375, -0.375, 0.5,  0.375, 0.375},
+    },
+  },
+  connect_sides = { "left" },
+  recipe = {
+    { 1, {
+        {"", "basic_materials:ic", microexpansion.iron_ingot_ingredient },
+        {"", "microexpansion:cable", "group:shovel" },
+        {"", "", microexpansion.iron_ingot_ingredient },
+      },
+    },
+    { 1, {
+        {"", "microexpansion:logic_chip", microexpansion.iron_ingot_ingredient },
+        {"", "microexpansion:cable", "group:shovel" },
+        {"", "", microexpansion.iron_ingot_ingredient },
+      },
+    }
+  },
+  groups = { crumbly = 1 },
+  on_timer = exporter_timer,
+  on_construct = function(pos)
+    item_transfer.setup_io_device("ME Exporter",pos)
+    me.send_event(pos,"connect")
+    --perhaps write a propper update self function
+    item_transfer.update_timer_based(pos,nil,{type="construct"})
+  end,
+  after_destruct = function(pos)
+    minetest.get_node_timer(pos):stop()
+    me.send_event(pos,"disconnect")
+  end,
+  on_metadata_inventory_put = function(pos, listname, _, stack, player)
+    if listname == "upgrades" then
+      item_transfer.setup_io_device("ME Exporter",pos)
+    end
+  end,
+  on_metadata_inventory_take = function(pos, listname, _, stack, player)
+    if listname == "upgrades" then
+      item_transfer.setup_io_device("ME Exporter",pos)
+    end
+  end
+})
+
+if me.uinv_category_enabled then
+  unified_inventory.add_category_item("storage", "microexpansion:exporter")
+end
diff --git a/modules/item_transfer/importer.lua b/modules/item_transfer/importer.lua
new file mode 100644
index 0000000..a563fef
--- /dev/null
+++ b/modules/item_transfer/importer.lua
@@ -0,0 +1,100 @@
+-- microexpansion/machines.lua
+
+local me = microexpansion
+local item_transfer = me.item_transfer
+local access_level = microexpansion.constants.security.access_levels
+
+function importer_timer(pos, elapsed)
+  local net, cp = me.get_connected_network(pos)
+  if not net then
+    return false
+  end
+  local node = minetest.get_node(pos)
+  local target = vector.add(pos, microexpansion.facedir_to_right_dir(node.param2))
+  --TODO: allow setting list with upgrade
+  local list, inv = item_transfer.get_output_inventory(target)
+  if list then
+    local own_inv = minetest.get_meta(pos):get_inventory()
+    local upgrades = me.count_upgrades(own_inv)
+    local count = math.min(net:get_inventory_space(),math.pow(2, upgrades.bulk or 0))
+    if count <= 0 then
+      return true
+    end
+    local import_filter = function(stack)
+      local stack_name = stack:get_name()
+      if minetest.get_item_group(stack_name, "microexpansion_cell") > 0 then
+        return true
+      end
+      if upgrades.filter then
+        return not own_inv:contains_item("filter",stack:peek_item())
+      end
+      return false
+    end
+    microexpansion.move_inv({inv=inv,name=list}, {inv=net:get_inventory(),name="main",huge=true}, count, import_filter)
+    net:set_storage_space(true)
+  end
+  return true
+end
+
+-- [MicroExpansion Importer] Register node
+item_transfer.register_io_device("importer", {
+  description = "ME Importer",
+  usedfor = "Imports items from machines into ME Networks",
+  tiles = {
+    "importer",
+    "importer",
+    "interface",
+    "cable",
+    "microexpansion_importer.png^[transform4",
+    "importer",
+  },
+  drawtype = "nodebox",
+  node_box = {
+    type = "fixed",
+    fixed = {
+      {-0.5, -0.25, -0.25, 0.25,  0.25, 0.25},
+      {0.25, -0.375, -0.375, 0.5,  0.375, 0.375},
+    },
+  },
+  connect_sides = { "left" },
+  recipe = {
+    { 1, {
+        {"", "basic_materials:ic", microexpansion.iron_ingot_ingredient },
+        {"", "microexpansion:cable", "group:hoe" },
+        {"", "", microexpansion.iron_ingot_ingredient },
+      },
+    },
+    { 1, {
+        {"", "microexpansion:logic_chip", microexpansion.iron_ingot_ingredient },
+        {"", "microexpansion:cable", "group:hoe" },
+        {"", "", microexpansion.iron_ingot_ingredient },
+      },
+    }
+  },
+  is_ground_content = false,
+  groups = { crumbly = 1 },
+  on_timer = importer_timer,
+  on_construct = function(pos)
+    item_transfer.setup_io_device("ME Importer",pos)
+    me.send_event(pos,"connect")
+    item_transfer.update_timer_based(pos)
+  end,
+  after_destruct = function(pos)
+    minetest.get_node_timer(pos):stop()
+    me.send_event(pos,"disconnect")
+  end,
+  on_metadata_inventory_put = function(pos, listname, _, stack, player)
+    if listname == "upgrades" then
+      item_transfer.setup_io_device("ME Importer",pos)
+    end
+  end,
+  on_metadata_inventory_take = function(pos, listname, _, stack, player)
+    if listname == "upgrades" then
+      item_transfer.setup_io_device("ME Importer",pos)
+    end
+  end
+})
+
+if me.uinv_category_enabled then
+  unified_inventory.add_category_item("storage", "microexpansion:importer")
+end
diff --git a/modules/item_transfer/init.lua b/modules/item_transfer/init.lua
new file mode 100644
index 0000000..086c5cc
--- /dev/null
+++ b/modules/item_transfer/init.lua
@@ -0,0 +1,25 @@
+-- storage/init.lua
+
+local module_path = microexpansion.get_module_path("item_transfer")
+
+microexpansion.require_module("network")
+
+
+-- Iron Ingot Ingredient for MineClone2
+microexpansion.iron_ingot_ingredient = nil
+if minetest.get_modpath("mcl_core") then
+  microexpansion.iron_ingot_ingredient = "mcl_core:iron_ingot"
+else
+  microexpansion.iron_ingot_ingredient = "default:steel_ingot"
+end
+
+-- Load API
+dofile(module_path.."/api.lua")
+
+-- Load upgrade cards
+dofile(module_path.."/upgrades.lua")
+
+-- Load ports
+dofile(module_path.."/importer.lua")
+dofile(module_path.."/exporter.lua")
+--dofile(module_path.."/interface.lua")
diff --git a/modules/item_transfer/upgrades.lua b/modules/item_transfer/upgrades.lua
new file mode 100644
index 0000000..8631ba3
--- /dev/null
+++ b/modules/item_transfer/upgrades.lua
@@ -0,0 +1,67 @@
+-- shared/init.lua
+
+local me = microexpansion
+
+-- TODO: regulation upgrade (1: disable in formspec, mesecon control; 2: requests from the me network and perhaps digiline)
+
+-- [register item] Upgrade Base
+me.register_item("upgrade_base", {
+  description = "Upgrade Base",
+  usedfor = "the base for crafting upgrades",
+  recipe = {
+    { 1, {
+        { "microexpansion:quartz_crystal" },
+        { microexpansion.iron_ingot_ingredient },
+      },
+    },
+  },
+})
+
+-- [register item] Bulk Upgrade
+me.register_item("upgrade_bulk", {
+  description = "Bulk Upgrade",
+  usedfor = "upgrades components to process more at the same time",
+  recipe = {
+    { 1, {
+        {"basic_materials:gold_wire"},
+        {"microexpansion:upgrade_base"}
+      },
+    },
+    { 1, {
+        {"microexpansion:gold_wire"},
+        {"microexpansion:upgrade_base"}
+      },
+    },
+  },
+})
+
+-- [register item] Filter Upgrade
+me.register_item("upgrade_filter", {
+  description = "Filter Upgrade",
+  usedfor = "allows setting up filters for components",
+  recipe = {
+    { 1, {
+        {"microexpansion:quartz_crystal"},
+        {"microexpansion:upgrade_base"}
+      },
+    },
+  },
+})
+
+-- [register item] Control Upgrade
+me.register_item("upgrade_control", {
+  description = "Control Upgrade",
+  usedfor = "allows more fine tuned control over components",
+  recipe = {
+    { 1, {
+        {"basic_materials:ic"},
+        {"microexpansion:upgrade_base"}
+      },
+    },
+    { 1, {
+        {"microexpansion:logic_chip"},
+        {"microexpansion:upgrade_base"}
+      },
+    },
+  },
+})
diff --git a/modules/network/constants.lua b/modules/network/constants.lua
new file mode 100644
index 0000000..57fed8b
--- /dev/null
+++ b/modules/network/constants.lua
@@ -0,0 +1,57 @@
+local me = microexpansion
+if not me.constants then
+  me.constants = {}
+end
+local constants = me.constants
+
+local access_levels = {
+  -- cannot interact at all with the network or it's components
+  blocked = 0,
+  -- can only look into the network but not move, modify, etc.
+  view = 20,
+  -- can use chests, craft terminals, etc.
+  interact = 40,
+  -- can use all components except security, can build and dig (except core)
+  modify = 60,
+  -- can use security terminal, can modify all players with less access
+  manage = 80,
+  -- can modify all players with less access and self
+  full = 100
+}
+
+local access_level_descriptions = {}
+access_level_descriptions[access_levels.blocked] = {
+  name = "Blocked",
+  color = "gray",
+  index = 1
+}
+access_level_descriptions[access_levels.view] = {
+  name = "View",
+  color = "orange",
+  index = 2
+}
+access_level_descriptions[access_levels.interact] = {
+  color = "yellow",
+  name = "Interact",
+  index = 3
+}
+access_level_descriptions[access_levels.modify] = {
+  name = "Modify",
+  color = "yellowgreen",
+  index = 4
+}
+access_level_descriptions[access_levels.manage] = {
+  name = "Manage",
+  color = "green",
+  index = 5
+}
+access_level_descriptions[access_levels.full] = {
+  name = "Full",
+  color = "blue",
+  index = 6
+}
+
+constants.security = {
+  access_levels = access_levels,
+  access_level_descriptions = access_level_descriptions
+}
diff --git a/modules/network/ctrl.lua b/modules/network/ctrl.lua
index a30c7a8..073faee 100644
--- a/modules/network/ctrl.lua
+++ b/modules/network/ctrl.lua
@@ -2,9 +2,19 @@
 
 local me = microexpansion
 local network = me.network
+local access_level = microexpansion.constants.security.access_levels
 
---FIXME: accept multiple controllers in one network
+local ctrl_recipe = nil
 
+ctrl_recipe = {
+  { 1, {
+    {microexpansion.iron_ingot_ingredient, "microexpansion:steel_infused_obsidian_ingot", microexpansion.iron_ingot_ingredient},
+    {microexpansion.iron_ingot_ingredient, "microexpansion:machine_casing", microexpansion.iron_ingot_ingredient},
+    {microexpansion.iron_ingot_ingredient, "microexpansion:cable", microexpansion.iron_ingot_ingredient},
+    },
+  }
+}
+	
 -- [register node] Controller
 me.register_node("ctrl", {
   description = "ME Controller",
@@ -16,14 +26,7 @@ me.register_node("ctrl", {
     "ctrl_sides",
     "ctrl_sides"
   },
-  recipe = {
-    { 1, {
-	{"default:steel_ingot", "microexpansion:steel_infused_obsidian_ingot", "default:steel_ingot"},
-	{"default:steel_ingot",       "microexpansion:machine_casing",         "default:steel_ingot"},
-	{"default:steel_ingot",             "microexpansion:cable",            "default:steel_ingot"},
-      },
-    }
-  },
+  recipe = ctrl_recipe,
   drawtype = "nodebox",
   paramtype = "light",
   node_box = {
@@ -48,6 +51,7 @@ me.register_node("ctrl", {
     -- for on/off switch to conserve power
     mesecon_effector_off = 1, mesecon = 2,
   },
+  connect_sides = "nobottom",
   --HV_EU_demand = 10,
   -- typical technic connections:
   -- connect_sides = {"bottom", "front", "left", "right"},
@@ -74,11 +78,14 @@ me.register_node("ctrl", {
       me.send_event(pos, "power")
     end
   end,
-  connect_sides = "nobottom",
   me_update = function(pos,_,ev)
-    local net = me.get_network(pos)
-    if net == nil then
-      me.log("no network for ctrl at pos "..minetest.pos_to_string(pos),"error")
+    local meta = minetest.get_meta(pos)
+    if meta:get_string("source") ~= "" then
+      return
+    end
+    local cnet = me.get_network(pos)
+    if cnet == nil then
+      microexpansion.log("no network for ctrl at pos "..minetest.pos_to_string(pos),"error")
       return
     end
     net:update()
@@ -103,8 +110,13 @@ me.register_node("ctrl", {
   }},
   on_construct = function(pos)
     local meta = minetest.get_meta(pos)
-    local net = network.new({controller_pos = pos})
-    table.insert(me.networks,net)
+    local net,cp = me.get_connected_network(pos)
+    if net then
+      meta:set_string("source", vector.to_string(cp))
+    else
+      net = network.new({controller_pos = pos})
+      table.insert(me.networks,net)
+    end
     me.send_event(pos,"connect",{net=net})
 
     meta:set_int("enabled", 0)
@@ -116,12 +128,59 @@ me.register_node("ctrl", {
     meta:set_string("infotext", "Network Controller (owned by "..name..")")
     meta:set_string("owner", name)
   end,
+  after_place_node = function(pos, player)
+    local name = player:get_player_name()
+    local meta = minetest.get_meta(pos)
+    meta:set_string("infotext", "Network Controller")
+    meta:set_string("owner", name)
+    local net,idx = me.get_network(pos)
+    if net then
+      net:set_access_level(name, me.constants.security.access_levels.full)
+    elseif meta:get_string("source") == "" then
+      me.log("no network after placing controller", "warning")
+    end
+  end,
+  can_dig = function(pos, player)
+    if not player then
+      return false
+    end
+    local name = player:get_player_name()
+    if minetest.is_protected(pos, name) then
+      minetest.record_protection_violation(pos, name)
+      return false
+    end
+    local meta = minetest.get_meta(pos)
+    local net
+    if meta:get_string("source") == "" then
+      net = me.get_network(pos)
+    else
+      net = me.get_connected_network(pos)
+    end
+    if not net then
+      me.log("ME Network Controller without Network","error")
+      return true
+    end
+    return net:get_access_level(name) >= access_level.full
+  end,
   on_destruct = function(pos)
     local net,idx = me.get_network(pos)
     --disconnect all those who need the network
     me.send_event(pos,"disconnect",{net=net})
     if net then
-      net:destruct()
+      if me.promote_controller(pos,net) then
+	--reconnect with new controller
+	me.send_event(pos,"reconnect",{net=net})
+      else
+	net:destruct()
+	if idx then
+	  table.remove(me.networks,idx)
+	end
+	--disconnect all those that haven't realized the network is gone
+	me.send_event(pos,"disconnect")
+      end
+    else
+      -- disconnect just in case
+      me.send_event(pos,"disconnect")
     end
     if idx then
       table.remove(me.networks,idx)
@@ -137,6 +196,8 @@ me.register_node("ctrl", {
     type = "controller",
   },
   on_timer = function(pos, elapsed)
+    --FIXME: we don't do that here (no goto statements please)
+    --       replace with loop or zero timer (next worldstep)
     ::top::
     me.log("TIMER: starting service", "error")
     local net = me.get_network(pos)
@@ -170,6 +231,39 @@ me.register_node("ctrl", {
   end,
 })
 
+minetest.register_lbm({
+  name = "microexpansion:update_network",
+  label = "integrate new ME Network data",
+  nodenames = {"microexpansion:ctrl"},
+  run_at_every_load = true,
+  action = function(pos)
+    local meta = minetest.get_meta(pos)
+    local net,idx = me.get_network(pos)
+    if not meta then
+      me.log("activated controller before metadata was available", "warning")
+      return
+    end
+    local source = meta:get_string("source")
+    if not net then
+      if source == "" then
+	me.log("activated controller without network", "warning")
+	return
+      else
+	net = me.get_network(vector.from_string(source))
+	if not net then
+	  me.log("activated controller that is linked to an unloaded controller", "info")
+	  return
+	end
+      end
+    end
+    if not net.access then
+      me.log("added access table to old network", "action")
+      net.access = {}
+    end
+    net:fallback_access()
+  end
+})
+
 -- [register node] Cable
 me.register_machine("cable", {
   description = "ME Cable",
@@ -196,10 +290,49 @@ me.register_machine("cable", {
   paramtype = "light",
   groups = { crumbly = 1, },
   --TODO: move these functions into the registration
+  can_dig = function(pos, player)
+    if not player then
+      return false
+    end
+    local name = player:get_player_name()
+    if minetest.is_protected(pos, name) then
+      minetest.record_protection_violation(pos, name)
+      return false
+    end
+    local net,cp = me.get_connected_network(pos)
+    if not net then
+      return true
+    end
+    return net:get_access_level(name) >= access_level.modify
+  end,
   on_construct = function(pos)
+    --perhaps this needs to be done after the check if it can be placed
     me.send_event(pos,"connect")
   end,
+  after_place_node = function(pos, placer)
+    if not placer then
+      return false
+    end
+    local name = placer:get_player_name()
+    if minetest.is_protected(pos, name) then
+      minetest.record_protection_violation(pos, name)
+      --protection probably handles this itself
+      --minetest.remove_node(pos)
+      return true
+    end
+    --TODO: prevent connecting multiple networks
+    local net,cp = me.get_connected_network(pos)
+    if not net then
+      return false
+    end
+    if net:get_access_level(name) < access_level.modify then
+      -- prevent placing cables on a network that a player doesn't have access to
+      minetest.remove_node(pos)
+      return true
+    end
+  end,
   after_destruct = function(pos)
+    --FIXME: write drives before disconnecting
     me.send_event(pos,"disconnect")
   end,
   me_update = function(pos,_,ev)
@@ -207,14 +340,12 @@ me.register_machine("cable", {
       if ev.type ~= "disconnect" then return end
     end
     --maybe this shouldn't be called on every update
-    if false then
     local meta = minetest.get_meta(pos)
     if me.get_connected_network(pos) then
       meta:set_string("infotext", "Network connected")
     else
       meta:set_string("infotext", "No Network")
     end
-    end
   end,
   machine = {
     type = "conductor",
@@ -226,3 +357,9 @@ if technic then
    -- producer receiver, producer_receiver, battery
   technic.register_machine("HV", "microexpansion:ctrl", technic.receiver)
 end
+
+if me.uinv_category_enabled then
+  unified_inventory.add_category_item("storage", "microexpansion:ctrl")
+  unified_inventory.add_category_item("storage", "microexpansion:cable")
+end
+
diff --git a/modules/network/init.lua b/modules/network/init.lua
index 9dab9c9..0a03103 100644
--- a/modules/network/init.lua
+++ b/modules/network/init.lua
@@ -2,6 +2,9 @@ local me       = microexpansion
 me.networks    = {}
 local networks = me.networks
 local path     = me.get_module_path("network")
+local storage  = minetest.get_mod_storage()
+
+dofile(path.."/constants.lua")
 
 local annotate_large_stack = function(stack, count)
   local description = minetest.registered_items[stack:get_name()]
@@ -361,7 +364,7 @@ function me.connected_nodes(start_pos,include_ctrl)
 	if vector.equals(closed,current.pos) then
 	  --found one was closed
 	  open = false
-	end
+        end
       end
     end
     -- get all connected nodes
@@ -382,14 +385,36 @@ end
 function me.get_connected_network(start_pos)
   for npos,nn in me.connected_nodes(start_pos,true) do
     if nn == "microexpansion:ctrl" then
-      local net = me.get_network(npos)
-      if net then
-	return net,npos
+      local source = minetest.get_meta(npos):get_string("source")
+      local network
+      if source == "" then
+        network = me.get_network(npos)
+      else
+        network = me.get_network(vector.from_string(source))
+      end
+      if network then
+        return network,npos
       end
     end
   end
 end
 
+function me.promote_controller(start_pos,net)
+  local promoted = false
+  for npos,nn in me.connected_nodes(start_pos,true) do
+    if nn == "microexpansion:ctrl" and npos ~= start_pos then
+      if promoted then
+        minetest.get_meta(npos):set_string("source", promoted)
+      else
+        promoted = vector.to_string(npos)
+        minetest.get_meta(npos):set_string("source", "")
+        net.controller_pos = npos
+      end
+    end
+  end
+  return promoted and true or false
+end
+
 function me.update_connected_machines(start_pos,event,include_start)
   me.log("updating connected machines", "action")
   local ev = event or {type = "n/a"}
@@ -430,20 +455,33 @@ function me.get_network(pos)
 end
 
 dofile(path.."/ctrl.lua") -- Controller/wires
+dofile(path.."/security.lua") --Security Terminal
 
 -- load networks
 function me.load()
-  local f = io.open(me.worldpath.."/microexpansion_networks", "r")
-  if f then
-    local res = minetest.deserialize(f:read("*all"))
-    f:close()
-    if type(res) == "table" then
-      for _,n in pairs(res) do
-	local net = me.network.new(n)
-	net:load()
-	table.insert(me.networks,net)
-      end
+  local res = storage:get_string("networks")
+  if res == "" then
+    local f = io.open(me.worldpath.."/microexpansion_networks", "r")
+    if f then
+      me.log("loading network data from file","action")
+      res = minetest.deserialize(f:read("*all"))
+      f:close()
+    else
+      me.log("no network data loaded","action")
+      return
     end
+  else
+    me.log("loading network data from mod storage","action")
+    res = minetest.deserialize(res)
+  end
+  if type(res) == "table" then
+    for _,n in pairs(res) do
+     local net = me.network.new(n)
+     net:load()
+     table.insert(me.networks,net)
+    end
+  else
+    me.log("network data in unexpected format","error")
   end
 end
 
@@ -461,9 +499,35 @@ function me.save()
     net.process = nil
     table.insert(data,net:serialize())
   end
-  local f = io.open(me.worldpath.."/microexpansion_networks", "w")
-  f:write(minetest.serialize(data))
-  f:close()
+  if storage then
+    me.log("saving network data to mod storage","info")
+    storage:set_string("networks", minetest.serialize(data))
+  else
+    me.log("saving network data to file","info")
+    local f = io.open(me.worldpath.."/microexpansion_networks", "w")
+    f:write(minetest.serialize(data))
+    f:close()
+  end
+end
+
+function me.do_autosave()
+  me.last_autosave = -1
+  minetest.after(1, function()
+    --print("autosaving ME Networks")
+    me.save()
+    me.last_autosave = minetest.get_server_uptime()
+  end)
+end
+
+function me.autosave()
+  --TODO: make max autosave interval settable
+  if not me.last_autosave then
+    me.do_autosave()
+  elseif me.last_autosave == -1 then
+    return
+  elseif minetest.get_server_uptime() - me.last_autosave >= 600 then
+    me.do_autosave()
+  end
 end
 
 -- save on server shutdown
diff --git a/modules/network/network.lua b/modules/network/network.lua
index f2cde63..48f84ee 100644
--- a/modules/network/network.lua
+++ b/modules/network/network.lua
@@ -1,15 +1,20 @@
 --- Microexpansion network
 -- @type network
 -- @field #table controller_pos the position of the controller
+-- @field #table access a table of players and their respective access levels
+-- @field #number default_access_level the access level of unlisted players
 -- @field #number power_load the power currently provided to the network
 -- @field #number power_storage the power that can be stored for the next tick
 local network = {
+  default_access_level = microexpansion.constants.security.access_levels.view,
   power_load = 0,
   power_storage = 0
 }
 local me = microexpansion
 me.network = network
 
+local access_level = microexpansion.constants.security.access_levels
+
 --- construct a new network
 -- @function [parent=#network] new
 -- @param #table or the object to become a network or nil
@@ -82,16 +87,79 @@ function network.adjacent_connected_nodes(pos, include_ctrl)
       if include_ctrl == false then
 	if nn ~= "microexpansion:ctrl" then
 	  table.insert(nodes,{pos = apos, name = nn})
-	end
+        end
       else
 	table.insert(nodes,{pos = apos, name = nn})
       end
-     end
+    end
   end
-
   return nodes
 end
 
+function network:get_access_level(player)
+  local name
+  local has_bypass = minetest.check_player_privs(player, "protection_bypass")
+  if not player then
+    return self.default_access_level
+  elseif has_bypass then
+    return me.constants.security.access_levels.full
+  elseif type(player) == "string" then
+    name = player
+  else
+    name = player:get_player_name()
+  end
+  if not self.access and not has_bypass then
+    return self.default_access_level
+  end
+  return self.access[name] or self.default_access_level
+end
+
+function network:set_access_level(player, level)
+  local name
+  if not player then
+    self.default_access_level = level
+  elseif type(player) == "string" then
+    name = player
+  else
+    name = player:get_player_name()
+  end
+  if not self.access then
+    self.access = {}
+  end
+  self.access[name] = level
+  self:fallback_access()
+  -- autosave network data
+  me.autosave()
+end
+
+function network:fallback_access()
+  local full_access = access_level.full
+  if not self.access then
+    --something must have gone badly wrong
+    me.log("no network access table in fallback method","error")
+    self.access = {}
+  end
+  for _,l in pairs(self.access) do
+    if l == full_access then
+      return
+    end
+  end
+  local meta = minetest.get_meta(self.controller_pos)
+  local owner = meta:get_string("owner")
+  if owner == "" then
+    me.log("ME Network Controller without owner at: " .. vector.to_string(self.controller_pos), "warning")
+  else
+    self.access[owner] = full_access
+  end
+end
+
+function network:list_access()
+  if not self.access then
+    self.access = {}
+  end
+  return self.access
+end
+
 --- provide power to the network
 -- @function [parent=#network] provide
 -- @param #number power the amount of power provided
@@ -169,7 +237,7 @@ function network:get_item_capacity()
     end
   end
   self.capacity_cache = cap
-  me.log("total capacity is "..cap, "error")
+  me.log("total capacity is "..cap, "verbose")
   return cap
 end
 
@@ -233,6 +301,8 @@ function network:set_storage_space(count, listname)
     needed = needed + csize
     self:remove_slots(inv, listname, needed, csize)
   end
+  -- autosave network data
+  me.autosave()
 end
 
 function network:update()
@@ -279,10 +349,33 @@ function network:find_loan(inv, stack)
   return nil
 end
 
+function network:get_inventory_space(inv, list)
+  local inv = inv or self:get_inventory()
+  local listname = list or "main"
+  local max_slots = inv:get_size(listname)
+  local max_items = self.capacity_cache
+
+  local slots, items = 0, 0
+  -- Get amount of items in drive
+  for i = 1, max_slots do
+    local dstack = inv:get_stack(listname, i)
+    if dstack:get_name() ~= "" then
+      slots = slots + 1
+      local num = dstack:get_count()
+      if num == 0 then num = 1 end
+      items = items + num
+    end
+  end
+  return math.max(max_items-items,0)
+end
+
 local function create_inventory(net)
   local invname = net:get_inventory_name()
   net.inv = minetest.create_detached_inventory(invname, {
-    allow_put = function(inv, listname, index, stack)
+    allow_put = function(inv, listname, index, stack, player)
+      if net:get_access_level(player) < access_level.interact then
+        return 0
+      end
       local inside_stack = inv:get_stack(listname, index)
       local stack_name = stack:get_name()
       if minetest.get_item_group(stack_name, "microexpansion_cell") > 0 and
@@ -318,6 +411,9 @@ local function create_inventory(net)
       net:set_storage_space(true)
     end,
     allow_take = function(inv, listname, slot, stack, player)
+      if net:get_access_level(player) < access_level.interact then
+        return 0
+      end
       -- This is not remove_item, we only remove the loan. This real
       -- item will be removed.
       me.log("REMOVE: network allow taking of "..stack:get_name().." from "..listname, "error")
diff --git a/modules/network/security.lua b/modules/network/security.lua
new file mode 100644
index 0000000..72d821d
--- /dev/null
+++ b/modules/network/security.lua
@@ -0,0 +1,292 @@
+-- microexpansion/network/security.lua
+
+local me = microexpansion
+local access_level = me.constants.security.access_levels
+local access_desc = me.constants.security.access_level_descriptions
+
+-- [me security] Get formspec
+local function security_formspec(pos, player, rule, q)
+  local list
+  local buttons
+  local logout = true
+  local query = q or ""
+  local net,cp = me.get_connected_network(pos)
+  if player and cp then
+    local access = net:get_access_level(player)
+    if access < access_level.manage then -- Blocked dialog
+      logout = false
+      list = "label[2.5,3;"..minetest.colorize("red", "Access Denied").."]"
+      buttons = "button[3.5,6;2,1;logout;back]"
+    elseif (not rule) or rule == "" then -- Main Screen
+      --TODO: show button or entry for default access level
+      list = "tablecolumns[color,span=1;text;color,span=1;text]"
+             .. "table[0.5,2;6,7;access_table;"
+      local first = true
+      --TODO: filter
+      local name_list = {}
+      for p,l in pairs(net:list_access()) do
+	if first then
+	  first = false
+	else
+	  list = list .. ","
+	end
+	table.insert(name_list, p)
+	local desc = access_desc[l] or {name = "Unknown", color = "red"}
+	list = list .. "cyan," .. p .. "," .. desc.color .. "," .. desc.name
+      end
+      list = list .. ";]"
+      minetest.get_meta(pos):set_string("table_index", minetest.serialize(name_list))
+
+      list = list .. [[
+	field[0.5,1;2,0.5;filter;;]]..query..[[]
+	button[3,1;0.8,0.5;search;?]
+	button[4,1;0.8,0.5;clear;X]
+	tooltip[search;Search]
+	tooltip[clear;Reset]
+	field_close_on_enter[filter;false]
+      ]]
+      buttons = [[
+	button[7,7;1.5,0.8;new;new rule]
+	button[7,8;1.5,0.8;edit_sel;edit rule]
+      ]]
+      --button[7,6;1.5,0.8;del_sel;delete rule]
+    elseif rule == "<new>" then -- Creation screen
+      logout = false
+      local players = ""
+      for _,p in pairs(minetest.get_connected_players()) do
+	if players ~= "" then
+	  players = players .. ","
+	end
+	players = players .. p:get_player_name()
+      end
+      --TODO: add a text field (maybe toggelable)
+      list = [[
+        dropdown[3,2.75;5,0.5;new_player;]]..players..[[;]
+	label[1.5,3;rule for:]
+      ]]
+      buttons = [[
+        button[2,6;2,0.8;edit;add/edit]
+	button[5,6;2,0.8;back;cancel]
+      ]]
+    elseif (access < access_level.full and net:get_access_level(rule) >= access_level.manage) or (player ~= rule and access >= access_level.full and net:get_access_level(rule) >= access_level.full) then
+      -- low access dialog
+      list = "label[1,3;"..minetest.colorize("red", "You can only modify rules with lower access than yourself.").."]"
+      buttons = "button[3.5,6;2,1;back;back]"
+    else
+      local rule_level = net:get_access_level(rule)
+      local current = rule_level == access_level.blocked and  "1" or
+            rule_level == access_level.view and     "2" or
+	    rule_level == access_level.interact and "3" or
+	    rule_level == access_level.modify and   "4" or
+	    rule_level == access_level.manage and   "5" or
+	    rule_level == access_level.full and     "6" or ""
+      list = [[
+	label[1,3;rule for:]].."\t"..minetest.colorize("cyan", rule)..[[]
+	label[1,4;access level:]
+	dropdown[3,3.75;2,0.5;access;Blocked,View,Interact,Modify,Manage,Full;]]..current..[[]
+      ]]
+      buttons = [[
+	button[1,6;1,0.8;save;save]
+	button[3,6;2,0.8;reset;reset to default]
+	button[6,6;1,0.8;back;cancel]
+      ]]
+    end
+  elseif cp then
+    logout = false
+    list = "label[2.5,3;Welcome to the security Terminal!]"
+    buttons = [[
+      button[3.5,6;2,1;login;login]
+      button_exit[8,0.5;0.5,0.5;close;x]
+    ]]
+  else
+    logout = false
+    list = "label[2.5,3;" .. minetest.colorize("red", "No connected network!") .. "]"
+    buttons = "button_exit[3,6;2,1;close;close]"
+  end
+
+  return [[
+    formspec_version[2]
+    size[9,9.5]
+  ]]..
+    microexpansion.gui_bg ..
+    list ..
+    (logout and "button[7.5,0.5;1,0.5;logout;logout]" or "") ..
+    "label[0.5,0.5;ME Security Terminal]" ..
+    buttons
+end
+
+local function update_security(pos,_,ev)
+  --for now all events matter
+  
+  local network = me.get_connected_network(pos)
+  local meta = minetest.get_meta(pos)
+  if network == nil then
+    meta:set_string("editing_rule", "")
+    meta:set_string("formspec", security_formspec(pos))
+  end
+  meta:set_string("formspec", security_formspec(pos))
+end
+
+local security_recipe = nil
+if minetest.get_modpath("mcl_core") then
+  security_recipe = {
+    { 1, {
+      {"mcl_core:iron_ingot", "mcl_copper:copper_ingot", "mcl_core:iron_ingot"},
+      {"mcl_core:iron_ingot", "microexpansion:machine_casing", "mcl_core:iron_ingot"},
+      {"mcl_core:iron_ingot", "microexpansion:cable", "mcl_core:iron_ingot"},
+      },
+    }
+  }
+
+else
+  security_recipe = {
+    { 1, {
+      {"default:steel_ingot",   "default:copper_ingot",               "default:steel_ingot"},
+      {"default:steel_ingot", "microexpansion:machine_casing", "default:steel_ingot"},
+      {"default:steel_ingot", "microexpansion:cable",          "default:steel_ingot"},
+      },
+    }
+  }
+end
+
+-- [me chest] Register node
+microexpansion.register_node("security", {
+  description = "ME Security Terminal",
+  usedfor = "Allows controlling access to ME networks",
+  tiles = {
+    "security_bottom",
+    "security_bottom",
+    "chest_side",
+    "chest_side",
+    "chest_side",
+    "security_front",
+  },
+  recipe = security_recipe,
+  is_ground_content = false,
+  groups = { cracky = 1, me_connect = 1 },
+  paramtype = "light",
+  paramtype2 = "facedir",
+  me_update = update_security,
+  on_construct = function(pos)
+    local meta = minetest.get_meta(pos)
+    local net = me.get_connected_network(pos)
+    me.send_event(pos,"connect",{net=net})
+    update_security(pos)
+  end,
+  after_destruct = function(pos)
+    me.send_event(pos,"disconnect")
+  end,
+  can_dig = function(pos, player)
+    if not player then
+      return false
+    end
+    local name = player:get_player_name()
+    if minetest.is_protected(pos, name) then
+      minetest.record_protection_violation(pos, name)
+      return false
+    end
+    local net,cp = me.get_connected_network(pos)
+    if not net then
+      return true
+    end
+    return net:get_access_level(name) >= access_level.manage
+  end,
+  on_receive_fields = function(pos, _, fields, sender)
+    if fields.close then
+      return
+    end
+    local net,cp = me.get_connected_network(pos)
+    if net then
+      if cp then
+	microexpansion.log("network and ctrl_pos","info")
+      else
+	microexpansion.log("network but no ctrl_pos","warning")
+      end
+    else
+      if cp then
+	microexpansion.log("no network but ctrl_pos","warning")
+      else
+	microexpansion.log("no network and no ctrl_pos","info")
+      end
+    end
+    local meta = minetest.get_meta(pos)
+    local name = sender:get_player_name()
+    if not net then
+      microexpansion.log("no network connected to security terminal","warning")
+      return
+    end
+    if fields.logout then
+      meta:set_string("formspec", security_formspec(pos))
+    elseif fields.login or fields.back then
+      -- carry over networks from old versions
+      net:fallback_access()
+      meta:set_string("formspec", security_formspec(pos, name))
+    elseif fields.search or fields.key_enter_field == "filter" then
+      meta:set_string("formspec", security_formspec(pos, name), false, fields.filter)
+    elseif fields.clear then
+      meta:set_string("formspec", security_formspec(pos, name))
+    elseif fields.new then
+      meta:set_string("formspec", security_formspec(pos, name, "<new>"))
+    elseif fields.edit then
+      local access = net:get_access_level(name)
+      if not fields.new_player then
+	me.log("edit button without new player field","warning")
+	meta:set_string("formspec", security_formspec(pos, name))
+	return
+      end
+      if net:get_access_level(fields.new_player) == nil then
+	if access >= access_level.manage then
+	  net:set_access_level(fields.new_player, net:get_access_level())
+	end
+      end
+      meta:set_string("editing_rule", fields.new_player)
+      meta:set_string("formspec", security_formspec(pos, name, fields.new_player))
+    elseif fields.edit_sel then
+      meta:set_string("formspec", security_formspec(pos, name, meta:get_string("editing_rule")))
+    elseif fields.access_table then
+      local ev = minetest.explode_table_event(fields.access_table)
+      local table_index = minetest.deserialize(meta:get_string("table_index"))
+      local edit_player = table_index[ev.row]
+      if net:get_access_level(edit_player) == nil then
+        me.log("playerlist changed before editing","warning")
+	meta:set_string("formspec", security_formspec(pos, name))
+	return
+      else
+        meta:set_string("editing_rule", edit_player)
+	if ev.type == "DCL" then
+	  meta:set_string("formspec", security_formspec(pos, name, edit_player))
+	end
+      end
+    elseif fields.reset then
+      local rule = meta:get_string("editing_rule")
+      local access = net:get_access_level(name)
+      local old_level = net:get_access_level(rule)
+      local new_level = net.default_access_level
+      if (access > old_level or name == rule) and (access > new_level or access >= access_level.full) then
+        net:set_access_level(rule, nil)
+	--TODO: show fail dialog if access violation
+      end
+      meta:set_string("formspec", security_formspec(pos, name))
+    elseif fields.save then
+      local rule = meta:get_string("editing_rule")
+      local access = net:get_access_level(name)
+      local old_level = net:get_access_level(rule)
+      local new_level = fields.access == "Blocked" and access_level.blocked or
+			fields.access == "View" and access_level.view or
+			fields.access == "Interact" and access_level.interact or
+			fields.access == "Modify" and access_level.modify or
+			fields.access == "Manage" and access_level.manage or
+			fields.access == "Full" and access_level.full
+      if not new_level then
+        me.log("unknown access level selection " .. fields.access, "error")
+	--TODO: show fail dialog
+	return
+      end
+      if (access > old_level or name == rule) and access > new_level then
+        net:set_access_level(rule, new_level)
+	--TODO: show fail dialog if access violation
+      end
+      meta:set_string("formspec", security_formspec(pos, name))
+    end
+  end,
+})
diff --git a/modules/ores/init.lua b/modules/ores/init.lua
index 89296e6..29ca3ee 100644
--- a/modules/ores/init.lua
+++ b/modules/ores/init.lua
@@ -1,45 +1,86 @@
 -- ores/init.lua
 
 local me = microexpansion
+local mcl_core_modpath = minetest.get_modpath("mcl_core")
+stone_ingrediant = mcl_core_modpath and "mcl_core:stone" or "default:stone"
+
+
+local incranium_y_min = -300
+local incranium_y_max = -90
+
+local quartz_y_min = -31000
+local quartz_y_max = -5
+
+local incranium_cracky = 3
+local quartz_cracky = 3
+
+if mcl_core_modpath then
+  incranium_y_min = -55
+  incranium_y_max = -20
+  quartz_y_min = -50
+  quartz_y_max = 0
+  incranium_cracky = 3
+  quartz_cracky = 3
+end
+
+local quartz_nodedef = {
+  description = "Quartz Ore",
+  tiles = { "default_stone.png^microexpansion_ore_quartz.png" },
+  is_ground_content = true,
+  type = "ore",
+  groups = {cracky=quartz_cracky,material_stone=1, stone=1, pickaxey=3},
+  drop = "microexpansion:quartz_crystal",
+  oredef = {{
+    ore_type = "scatter",
+    wherein = stone_ingrediant,
+    clust_scarcity = 10*10*10,
+    clust_num_ores = 6,
+    clust_size = 5,
+    y_min = quartz_y_min,
+    y_max = quartz_y_max,
+  }},
+}
+
+incranium_nodedef = {
+  description = "Incranium Ore",
+  tiles = { "incranium" },
+  is_ground_content = true,
+  groups = {cracky=incranium_cracky, material_stone=1, stone=1,pickaxey=3 },
+  type = "ore",
+  oredef = {
+    {
+      ore_type = "blob",
+      wherein = stone_ingrediant,
+      clust_scarcity = 4*4*4,
+      clust_num_ores = 4,
+      clust_size = 3,
+      y_min = incranium_y_min,
+      y_max = incranium_y_max,
+    },
+  },
+  disabled = true,
+}
+
+if mcl_core_modpath then
+  quartz_nodedef._mcl_hardness = 3
+  quartz_nodedef._mcl_blast_resistance = 3
+  quartz_nodedef._mcl_hardness = 3
+  quartz_nodedef._mcl_silk_touch_drop = true
+  quartz_nodedef._mcl_fortune_drop = mcl_core.fortune_drop_ore
+
+  incranium_nodedef._mcl_hardness = 3
+  incranium_nodedef._mcl_blast_resistance = 3
+  incranium_nodedef._mcl_hardness = 3
+  incranium_nodedef._mcl_silk_touch_drop = true
+  incranium_nodedef._mcl_fortune_drop = mcl_core.fortune_drop_ore
+end
 
 -- [register] Incranium Ore
-me.register_node("incranium", {
-	description = "Incranium Ore",
-	tiles = { "incranium" },
-	is_ground_content = true,
-	groups = { cracky=3, stone=1 },
-	type = "ore",
-	oredef = {
-		{
-			ore_type = "blob",
-			wherein = "default:stone",
-			clust_scarcity = 4*4*4,
-			clust_num_ores = 4,
-			clust_size = 3,
-			y_min = -300,
-			y_max = -90,
-		},
-	},
-	disabled = true,
+me.register_node("incranium", incranium_nodedef)
+
+me.register_item("quartz_crystal", {
+  description = "Quartz Crystal",
 })
 
--- "Supernatet", pronounced "Super-nat-et" is Latin for "float", this ore will
--- float up if there are no blocks above it, so be careful!
--- Supernatet ore will be used to craft wings of flight
-me.register_node("supernatet", {
-	description = "Supernatant Ore",
-	tiles = { "default_stone.png^microexpansion_ore_supernatet.png" },
-	is_ground_content = true,
-	type = "ore",
-	groups = { cracky=3, stone=1 },
-	oredef = {
-		ore_type = "blob",
-		wherein = "default:stone",
-		clust_scarcity = 4*4*4,
-		clust_num_ores = 4,
-		clust_size = 3,
-		y_min = -300,
-		y_max = -90,
-	},
-	status = "unstable",
-})
+
+me.register_node("quartz", quartz_nodedef)
diff --git a/modules/power/gen.lua b/modules/power/gen.lua
index d9e6f0d..fa685bc 100644
--- a/modules/power/gen.lua
+++ b/modules/power/gen.lua
@@ -1,90 +1,104 @@
 -- power/gen.lua
 
 local me = microexpansion
+local fuel_fired_generator_recipe = nil
+if minetest.get_modpath("mcl_core") then
+fuel_fired_generator_recipe = {
+  { 1, {
+      {"mcl_core:iron_ingot", "mcl_furnaces:furnace",          "mcl_core:iron_ingot"},
+      {"mcl_core:iron_ingot", "microexpansion:machine_casing", "mcl_core:iron_ingot"},
+      {"mcl_core:iron_ingot", "mcl_core:iron_ingot",           "mcl_core:iron_ingot"},
+    },
+  }
+}
+
+else
+fuel_fired_generator_recipe = {
+  { 1, {
+      {"default:steel_ingot", "default:furnace",               "default:steel_ingot"},
+      {"default:steel_ingot", "microexpansion:machine_casing", "default:steel_ingot"},
+      {"default:steel_ingot", "default:steel_ingot",           "default:steel_ingot"},
+    },
+  }
+}
+end
 
 -- [register node] Fuel Fired Generator
 me.register_machine("fuel_fired_generator", {
-	description = "Fuel-Fired Generator",
-	tiles = {
-		"machine_sides",
-		"machine_sides",
-		"machine_sides",
-		"machine_sides",
-		"machine_sides",
-		"machine_sides",
-		"fuelgen_front",
-	},
-	recipe = {
-		{ 1, {
-				{ "default:steel_ingot", "default:furnace", "default:steel_ingot" },
-				{"default:steel_ingot", "microexpansion:machine_casing", "default:steel_ingot" },
-				{ "default:steel_ingot", "default:steel_ingot", "default:steel_ingot" },
-			},
-		}
-	},
-	groups = { cracky = 1 },
-	connect_sides = "machine",
-	paramtype2 = "facedir",
-	status = "unstable",
-	machine = {
-		type = "provider",
-		on_survey = function() -- args: pos
-			--TODO: burn fuel
-			return 5 -- Generate 5 ME/tick
-		end,
-	},
+  description = "Fuel-Fired Generator",
+  tiles = {
+    "machine_sides",
+    "machine_sides",
+    "machine_sides",
+    "machine_sides",
+    "machine_sides",
+    "machine_sides",
+    "fuelgen_front",
+  },
+  recipe = fuel_fired_generator_recipe,
+  groups = { cracky = 1 },
+  connect_sides = "machine",
+  paramtype2 = "facedir",
+  status = "unstable",
+  machine = {
+    type = "provider",
+    on_survey = function() -- args: pos
+      --TODO: burn fuel
+      return 5 -- Generate 5 ME/tick
+    end,
+  },
 })
 
 --[[register node] Super Smelter
 me.register_node("super_smelter", {
-	description = "Super Smelter",
-	tiles = {
-		"machine_sides",
-		"machine_sides",
-		"machine_sides",
-		"machine_sides",
-		"machine_sides",
-		"super_smelter_front",
-	},
-	recipe = {
-		{ 1, {
-				{ "default:furnace", "default:furnace", "default:furnace" },
-				{ "default:steel_ingot", "microexpansion:machine_casing", "default:steel_ingot" },
-				{ "default:steel_ingot", "default:steel_ingot", "default:steel_ingot" },
-			},
-		},
-	},
-	groups = { cracky = 1, me_connect = 1, },
-	connect_sides = "machine",
-	paramtype2 = "facedir",
-	status = "unstable",
-	machine = {
-		type = "consumer",
-		on_survey = function(pos)
-			return 5 -- Consume 5 ME/tick
-		end,
-	},
+  description = "Super Smelter",
+  tiles = {
+    "machine_sides",
+    "machine_sides",
+    "machine_sides",
+    "machine_sides",
+    "machine_sides",
+    "super_smelter_front",
+  },
+  recipe = {
+    { 1, {
+        {"default:furnace",     "default:furnace",               "default:furnace"},
+        {"default:steel_ingot", "microexpansion:machine_casing", "default:steel_ingot"},
+        {"default:steel_ingot", "default:steel_ingot",           "default:steel_ingot"},
+      },
+    },
+  },
+  groups = { cracky = 1, me_connect = 1, },
+  connect_sides = "machine",
+  paramtype2 = "facedir",
+  status = "unstable",
+  machine = {
+    type = "consumer",
+    on_survey = function(pos)
+      return 5 -- Consume 5 ME/tick
+    end,
+  },
 })
 
 -- [register item] Geothermal Generator
 me.register_node("geo_generator", {
-	description = "Geothermal Generator",
-	tiles = {
-		"machine_sides",
-		"machine_sides",
-		"machine_sides",
-		"machine_sides",
-		"machine_sides",
-		"geogen_front",
-	},
-	groups = { cracky = 1, me_connect = 1, },
-	connect_sides = "machine",
-	paramtype2 = "facedir",
-	status = "unstable",
-	machine = {
-		type = "provider",
-		on_survey = function(pos)
-			return 10 -- Generate 10 ME/tick
-		end,
-	},
+  description = "Geothermal Generator",
+  tiles = {
+    "machine_sides",
+    "machine_sides",
+    "machine_sides",
+    "machine_sides",
+    "machine_sides",
+    "geogen_front",
+  },
+  groups = { cracky = 1, me_connect = 1, },
+  connect_sides = "machine",
+  paramtype2 = "facedir",
+  status = "unstable",
+  machine = {
+    type = "provider",
+    on_survey = function(pos)
+      return 10 -- Generate 10 ME/tick
+    end,
+  },
 })]]
diff --git a/modules/power/network.lua b/modules/power/network.lua
index 57dbac2..bd36bd2 100644
--- a/modules/power/network.lua
+++ b/modules/power/network.lua
@@ -9,16 +9,16 @@ local power = me.power
 
 -- [local function] Get netitem by position
 local function get_netitem_by_pos(list, pos)
-	for _, i in pairs(list) do
-		if vector.equals(pos, i.pos) then
-			return i
-		end
-	end
+  for _, i in pairs(list) do
+    if vector.equals(pos, i.pos) then
+      return i
+    end
+  end
 end
 
 -- [function] Generate new network ID
 function power.new_id()
-	return "network_"..#me.networks+1
+  return "network_"..#me.networks+1
 end
 
 -- [function] Add machine to network
@@ -28,84 +28,84 @@ end
 
 -- [function] Remove machine from network
 function power.remove_machine(pos)
-	local meta = minetest.get_meta(pos)
-	meta:set_string("network_ignore", "true")
+  local meta = minetest.get_meta(pos)
+  meta:set_string("network_ignore", "true")
 end
 
 -- [function] Trace network
 function power.trace(pos)
-	local netpos = me.networks[minetest.get_meta(pos):get_string("network_id")]
+  local netpos = me.networks[minetest.get_meta(pos):get_string("network_id")]
 
-	-- if no network, return
-	if not netpos then
-		return
-	end
+  -- if no network, return
+  if not netpos then
+    return
+  end
 
-	local meta  = minetest.get_meta(netpos)
-	local netid = meta:get_string("network_id")
-	local list  = {}
+  local meta  = minetest.get_meta(netpos)
+  local netid = meta:get_string("network_id")
+  local list  = {}
 
-	local delete = false
-	if meta:get_string("network_ignore") == "true" then
-		delete = true
-	end
+  local delete = false
+  if meta:get_string("network_ignore") == "true" then
+    delete = true
+  end
 
-	-- [local function] Indexed
-	local function indexed(p)
-		for _, i in pairs(list) do
-			if vector.equals(p, i.pos) then
-				return true
-			end
-		end
-	end
+  -- [local function] Indexed
+  local function indexed(p)
+    for _, i in pairs(list) do
+      if vector.equals(p, i.pos) then
+        return true
+      end
+    end
+  end
 
-	-- [local function] Trace
-	local function trace(nodes)
-		for _, p in pairs(nodes) do
-			if not indexed(p) then
-				local machine = minetest.get_meta(p)
-				if machine:get_string("network_ignore") ~= "true" then
-					local node = me.get_node(p).name
-					local desc = minetest.registered_nodes[node].description
-					if delete then
-						machine:set_string("network_id", nil)
-						machine:set_string("infotext", desc.."\nNo Network")
-						me.network_set_demand(p, 0)
-					else
-						machine:set_string("network_id", netid)
-						machine:set_string("infotext", desc.."\nNetwork ID: "..netid)
-					end
+  -- [local function] Trace
+  local function trace(nodes)
+    for _, p in pairs(nodes) do
+      if not indexed(p) then
+        local machine = minetest.get_meta(p)
+        if machine:get_string("network_ignore") ~= "true" then
+          local node = me.get_node(p).name
+          local desc = minetest.registered_nodes[node].description
+          if delete then
+            machine:set_string("network_id", nil)
+            machine:set_string("infotext", desc.."\nNo Network")
+            me.network_set_demand(p, 0)
+          else
+            machine:set_string("network_id", netid)
+            machine:set_string("infotext", desc.."\nNetwork ID: "..netid)
+          end
 
-					list[#list + 1] = { pos = p, demand = machine:get_int("demand") }
-					trace(power.get_connected_nodes(p, false))
-				end
-			end
-		end
-	end
+          list[#list + 1] = { pos = p, demand = machine:get_int("demand") }
+          trace(power.get_connected_nodes(p, false))
+        end
+      end
+    end
+  end
 
-	trace(power.get_connected_nodes(netpos))
+  trace(power.get_connected_nodes(netpos))
 
-	-- Check original list
-	local original = minetest.deserialize(meta:get_string("netitems"))
-	if original then
-		for _, i in pairs(original) do
-			if not indexed(i.pos) then
-				local node = me.get_node(i.pos).name
-				local desc = minetest.registered_nodes[node].description
-				local machine = minetest.get_meta(i.pos)
-				machine:set_string("network_id", nil)
-				machine:set_string("infotext", desc.."\nNo Network")
-				me.network_set_demand(pos, 0)
-			end
-		end
-	end
+  -- Check original list
+  local original = minetest.deserialize(meta:get_string("netitems"))
+  if original then
+    for _, i in pairs(original) do
+      if not indexed(i.pos) then
+        local node = me.get_node(i.pos).name
+        local desc = minetest.registered_nodes[node].description
+        local machine = minetest.get_meta(i.pos)
+        machine:set_string("network_id", nil)
+        machine:set_string("infotext", desc.."\nNo Network")
+        me.network_set_demand(pos, 0)
+      end
+    end
+  end
 
-	meta:set_string("netitems", minetest.serialize(list))
+  meta:set_string("netitems", minetest.serialize(list))
 
-	-- Update infotext
-	meta:set_string("infotext", "Network Controller (owned by "..
-		meta:get_string("owner")..")\nNetwork ID: "..meta:get_string("network_id")..
-		"\nDemand: "..dump(me.network_get_demand(netpos)))
+  -- Update infotext
+  meta:set_string("infotext", "Network Controller (owned by "..
+    meta:get_string("owner")..")\nNetwork ID: "..meta:get_string("network_id")..
+    "\nDemand: "..dump(me.network_get_demand(netpos)))
 end
 
 ---
@@ -114,11 +114,11 @@ end
 
 -- [function] Get load information
 function me.network_get_load(pos)
-	local ctrl = me.networks[minetest.get_meta(pos):get_string("network_id")]
-	if ctrl then
-		local meta = minetest.get_meta(ctrl)
-		local list = minetest.deserialize(meta:get_string("netitems"))
-	end
+  local ctrl = me.networks[minetest.get_meta(pos):get_string("network_id")]
+  if ctrl then
+    local meta = minetest.get_meta(ctrl)
+    local list = minetest.deserialize(meta:get_string("netitems"))
+  end
 end
 
 ---- Generators ----
@@ -127,53 +127,53 @@ end
 
 -- [function] Get total network demand
 function me.network_get_demand(pos)
-	local ctrl = me.networks[minetest.get_meta(pos):get_string("network_id")]
+  local ctrl = me.networks[minetest.get_meta(pos):get_string("network_id")]
 
-	-- if no network, return
-	if not ctrl then
-		return
-	end
+  -- if no network, return
+  if not ctrl then
+    return
+  end
 
-	local meta = minetest.get_meta(ctrl)
-	local list = minetest.deserialize(meta:get_string("netitems"))
+  local meta = minetest.get_meta(ctrl)
+  local list = minetest.deserialize(meta:get_string("netitems"))
 
-	local demand = 0
-	for _, i in pairs(list) do
-		if i.demand then
-			demand = demand + i.demand
-		end
-	end
+  local demand = 0
+  for _, i in pairs(list) do
+    if i.demand then
+      demand = demand + i.demand
+    end
+  end
 
-	return demand
+  return demand
 end
 
 -- [function] Set demand for machine
 function me.network_set_demand(pos, demand)
-	-- Update original metadata
-	minetest.get_meta(pos):set_int("demand", demand)
+  -- Update original metadata
+  minetest.get_meta(pos):set_int("demand", demand)
 
-	local ctrl = me.networks[minetest.get_meta(pos):get_string("network_id")]
+  local ctrl = me.networks[minetest.get_meta(pos):get_string("network_id")]
 
-	-- if no network, return
-	if not ctrl then
-		return
-	end
+  -- if no network, return
+  if not ctrl then
+    return
+  end
 
-	local meta = minetest.get_meta(ctrl)
-	local list = minetest.deserialize(meta:get_string("netitems"))
-	local item = get_netitem_by_pos(list, pos)
+  local meta = minetest.get_meta(ctrl)
+  local list = minetest.deserialize(meta:get_string("netitems"))
+  local item = get_netitem_by_pos(list, pos)
 
-	if not item then
-		return
-	end
+  if not item then
+    return
+  end
 
-	item.demand = demand
-	meta:set_string("netitems", minetest.serialize(list))
+  item.demand = demand
+  meta:set_string("netitems", minetest.serialize(list))
 
-	-- Update infotext
-	meta:set_string("infotext", "Network Controller (owned by "..
-		meta:get_string("owner")..")\nNetwork ID: "..meta:get_string("network_id")..
-		"\nDemand: "..dump(me.network_get_demand(pos)))
+  -- Update infotext
+  meta:set_string("infotext", "Network Controller (owned by "..
+    meta:get_string("owner")..")\nNetwork ID: "..meta:get_string("network_id")..
+    "\nDemand: "..dump(me.network_get_demand(pos)))
 end
 
 ---- Storage ----
diff --git a/modules/shared/init.lua b/modules/shared/init.lua
deleted file mode 100644
index befb806..0000000
--- a/modules/shared/init.lua
+++ /dev/null
@@ -1,30 +0,0 @@
--- shared/init.lua
-
-local me = microexpansion
-
--- This mostly contains items that are used by multiple modules and
--- don't really fit with anything else.
-
--- [register item] Steel Infused Obsidian Ingot
-me.register_item("steel_infused_obsidian_ingot", {
-	description = "Steel Infused Obsidian Ingot",
-	recipe = {
-		{ 2, {
-				{ "default:steel_ingot", "default:obsidian_shard", "default:steel_ingot" },
-			},
-		},
-	},
-})
-
--- [register item] Machine Casing
-me.register_item("machine_casing", {
-	description = "Machine Casing",
-	recipe = {
-		{ 1, {
-				{"default:steel_ingot", "default:steel_ingot", "default:steel_ingot"},
-				{"default:steel_ingot", "default:copper_ingot", "default:steel_ingot"},
-				{"default:steel_ingot", "default:steel_ingot", "default:steel_ingot"},
-			},
-		},
-	},
-})
diff --git a/modules/storage/api.lua b/modules/storage/api.lua
index e03c531..9464ebd 100644
--- a/modules/storage/api.lua
+++ b/modules/storage/api.lua
@@ -2,53 +2,60 @@
 
 local BASENAME = "microexpansion"
 
+--FIXME: either consolidate or forbid crafting with filled cells
+
 -- [function] register cell
 function microexpansion.register_cell(itemstring, def)
-	if not def.inventory_image then
-		def.inventory_image = itemstring
-	end
+  if not def.inventory_image then
+    def.inventory_image = itemstring
+  end
 
-	-- register craftitem
-	minetest.register_craftitem(BASENAME..":"..itemstring, {
-		description = def.description,
-		inventory_image = BASENAME.."_"..def.inventory_image..".png",
-		groups = {microexpansion_cell = 1},
-		stack_max = 1,
-		microexpansion = {
-			base_desc = def.description,
-			drive = {
-				capacity = def.capacity or 5000,
-			},
-		},
-	})
+  -- register craftitem
+  minetest.register_craftitem(BASENAME..":"..itemstring, {
+    description = def.description,
+    inventory_image = BASENAME.."_"..def.inventory_image..".png",
+    groups = {microexpansion_cell = 1},
+    stack_max = 1,
+    microexpansion = {
+      base_desc = def.description,
+      drive = {
+        capacity = def.capacity or 5000,
+      },
+    },
+  })
 
-	-- if recipe, register recipe
-	if def.recipe then
-		microexpansion.register_recipe(BASENAME..":"..itemstring, def.recipe)
-	end
+  -- if recipe, register recipe
+  if def.recipe then
+    microexpansion.register_recipe(BASENAME..":"..itemstring, def.recipe)
+  end
+
+  if microexpansion.uinv_category_enabled then
+    unified_inventory.add_category_item("storage", BASENAME..":"..itemstring)
+  end
 end
 
 -- [function] Get cell size
 function microexpansion.get_cell_size(name)
-	if minetest.get_item_group(name, "microexpansion_cell") == 0 then
-		return 0
-	end
-	local item = minetest.registered_craftitems[name]
-	return item.microexpansion.drive.capacity
+  if minetest.get_item_group(name, "microexpansion_cell") == 0 then
+    return 0
+  end
+  local item = minetest.registered_craftitems[name]
+  return item.microexpansion.drive.capacity
 end
 
 -- [function] Calculate max stacks
 function microexpansion.int_to_stacks(int)
-	return math.ceil(int / 99)
+  return math.ceil(int / 99)
 end
 
 -- [function] Calculate number of pages
 function microexpansion.int_to_pagenum(int)
-	return math.floor(microexpansion.int_to_stacks(int) / 32)
+  return math.floor(microexpansion.int_to_stacks(int) / 32)
 end
 
--- [function] Move items from inv to inv
-function microexpansion.move_inv(net, inv1, inv2, max)
+--[[ [function] Move items from inv to inv
+function microexpansion.move_inv(inv1, inv2, max)
+>>>>>>> a21dbd9b825ab9727a42d597bc86f52342da7d44
   if max <= 0 then return end
   local finv, tinv   = inv1.inv, inv2.inv
   local fname, tname = inv1.name, inv2.name
@@ -81,3 +88,5 @@ function microexpansion.move_inv(net, inv1, inv2, max)
     end
   end
 end
+]]
+
diff --git a/modules/storage/drive.lua b/modules/storage/drive.lua
index c40762e..21adfb6 100644
--- a/modules/storage/drive.lua
+++ b/modules/storage/drive.lua
@@ -1,6 +1,7 @@
 -- microexpansion/machines.lua
 
 local me = microexpansion
+local access_level = microexpansion.constants.security.access_levels
 
 local netdrives
 
@@ -312,6 +313,26 @@ local function update_drive(pos,_,ev)
   end
 end
 
+if minetest.get_modpath("mcl_core") then
+  drive_recipe = {
+    { 1, {
+    {"mcl_core:iron_ingot", "mcl_chests:chest", "mcl_core:iron_ingot"},
+    {"mcl_core:iron_ingot", "microexpansion:machine_casing", "mcl_core:iron_ingot"},
+    {"mcl_core:iron_ingot", "mcl_chests:chest", "mcl_core:iron_ingot"},
+},
+}}
+
+else
+  drive_recipe = {
+    { 1, {
+	{"default:steel_ingot", "default:chest",                 "default:steel_ingot" },
+	{"default:steel_ingot", "microexpansion:machine_casing", "default:steel_ingot" },
+	{"default:steel_ingot", "default:chest",                 "default:steel_ingot" },
+      },
+    }
+  }
+end
+
 -- [me chest] Register node
 microexpansion.register_node("drive", {
   description = "ME Drive",
@@ -324,14 +345,7 @@ microexpansion.register_node("drive", {
     "chest_side",
     "drive_full",
   },
-  recipe = {
-    { 1, {
-	{"default:steel_ingot", "default:chest",                 "default:steel_ingot" },
-	{"default:steel_ingot", "microexpansion:machine_casing", "default:steel_ingot" },
-	{"default:steel_ingot", "default:chest",                 "default:steel_ingot" },
-      },
-    }
-  },
+  recipe = drive_recipe,
   is_ground_content = false,
   groups = { cracky = 1, me_connect = 1 },
   paramtype = "light",
@@ -340,14 +354,14 @@ microexpansion.register_node("drive", {
   on_construct = function(pos)
     local meta = minetest.get_meta(pos)
     meta:set_string("formspec",
-      "size[9,7.5]"..
+      "size[9,9.5]"..
       microexpansion.gui_bg ..
       microexpansion.gui_slots ..
     [[
       label[0,-0.23;ME Drive]
-      list[context;main;0,0.3;5,2]
-      list[current_player;main;0,3.5;8,1;]
-      list[current_player;main;0,4.73;8,3;8]
+      list[context;main;0,0.3;8,4]
+      list[current_player;main;0,5.5;8,1;]
+      list[current_player;main;0,6.73;8,3;8]
       listring[current_name;main]
       listring[current_player;main]
       field_close_on_enter[filter;false]
@@ -357,7 +371,19 @@ microexpansion.register_node("drive", {
     me.send_event(pos, "connect")
   end,
   can_dig = function(pos, player)
-    if minetest.is_protected(pos, player) then
+    if not player then
+      return false
+    end
+    local name = player:get_player_name()
+    if minetest.is_protected(pos, name) then
+      minetest.record_protection_violation(pos, name)
+      return false
+    end
+    local net,cp = me.get_connected_network(pos)
+    if not net then
+      return true
+    end
+    if net:get_access_level(name) < access_level.modify then
       return false
     end
     local meta = minetest.get_meta(pos)
@@ -368,11 +394,21 @@ microexpansion.register_node("drive", {
    me.send_event(pos, "disconnect")
   end,
   allow_metadata_inventory_put = function(pos, _, _, stack, player)
-    if minetest.is_protected(pos, player)
-       or minetest.get_item_group(stack:get_name(), "microexpansion_cell") == 0 then
+    local name = player:get_player_name()
+    local network = me.get_connected_network(pos)
+    if network then
+      if network:get_access_level(player) < access_level.interact then
+        return 0
+      end
+    elseif minetest.is_protected(pos, name) then
+      minetest.record_protection_violation(pos, name)
       return 0
     end
-    return 1
+    if minetest.get_item_group(stack:get_name(), "microexpansion_cell") == 0 then
+      return 0
+    else
+      return 1
+    end
   end,
   on_metadata_inventory_put = function(pos, _, _, stack)
     me.send_event(pos, "item_cap")
@@ -387,8 +423,10 @@ microexpansion.register_node("drive", {
       me.send_event(pos, "items", {net=network})
       return
     end
+    -- TODO: adjust for correct space
     -- network:set_storage_space(#items)
     for _,stack in pairs(items) do
+      -- TODO: do not change storage space in a loop
       network:set_storage_space(true)
       me.insert_item(stack, network, ctrl_inv, "main")
     end
@@ -396,10 +434,19 @@ microexpansion.register_node("drive", {
     me.send_event(pos, "items", {net=network})
   end,
   allow_metadata_inventory_take = function(pos,_,_,stack, player) --args: pos, listname, index, stack, player
-    if minetest.is_protected(pos, player) then
+    local name = player:get_player_name()
+    local network = me.get_connected_network(pos)
+    if network then
+      write_drive_cells(pos,network)
+      if network:get_access_level(player) < access_level.interact then
+        return 0
+      end
+    elseif minetest.is_protected(pos, name) then
+      minetest.record_protection_violation(pos, name)
       return 0
     end
     local network = me.get_connected_network(pos)
+    -- should the drives really be written every take action? (performance)
     write_drive_cells(pos,network)
     return stack:get_count()
   end,
@@ -418,8 +465,7 @@ microexpansion.register_node("drive", {
     for _,ostack in pairs(items) do
       local postack = ItemStack(ostack)
       -- me.log("drive meta_inv_take remove_item "..tostring(postack:get_count()).." "..postack:get_name(), "error")
-      -- TODO: this was here, but did nothing? me.remove_item(network, ctrl_inv, "main", postack)
-      -- No, this is the main item removal on cell removal from drive
+      -- This is the main item removal on cell removal from drive
       me.remove_item(network, ctrl_inv, "main", postack)
       --this returns 99 (max count) even if it removes more
       --ctrl_inv:remove_item("main", ostack)
@@ -430,3 +476,7 @@ microexpansion.register_node("drive", {
     me.send_event(pos, "items", {net=network})
   end,
 })
+
+if me.uinv_category_enabled then
+  unified_inventory.add_category_item("storage", "microexpansion:drive")
+end
diff --git a/modules/storage/storage.lua b/modules/storage/storage.lua
index a6f5569..881054f 100644
--- a/modules/storage/storage.lua
+++ b/modules/storage/storage.lua
@@ -2,15 +2,42 @@
 
 --TODO: use storagecomp for crafting
 
+if minetest.get_modpath("mcl_core") then
+microexpansion.register_cell("cell_1k", {
+  description = "1k ME Storage Cell",
+  capacity = 1000,
+  recipe = {
+    { 1, {
+        {"moreores:tin_ingot",      "mcl_copper:copper_ingot",                     "moreores:tin_ingot"},
+        {"mcl_copper:copper_ingot", "microexpansion:steel_infused_obsidian_ingot", "mcl_copper:copper_ingot"},
+        {"moreores:tin_ingot",      "mcl_copper:copper_ingot",                     "moreores:tin_ingot"}
+    }},
+  },
+})
+
+microexpansion.register_cell("cell_2k", {
+  description = "2k ME Storage Cell",
+  capacity = 2000,
+  recipe = {
+    { 1, {
+        {"mcl_copper:copper_ingot", "mcl_core:iron_ingot", "mcl_copper:copper_ingot"},
+        {"mcl_core:iron_ingot",     "mcl_core:obsidian",   "mcl_core:iron_ingot"},
+        {"mcl_copper:copper_ingot", "mcl_core:iron_ingot", "mcl_copper:copper_ingot"}
+    }},
+    { 1, "shapeless", {"microexpansion:cell_1k", "microexpansion:cell_1k"}}
+  },
+})
+else
+
 -- [drive] 1k
 microexpansion.register_cell("cell_1k", {
-	description = "1k ME Storage Cell",
-	capacity = 1000,
-	recipe = {
-	   { 1, {
-	      {"default:tin_ingot",          "default:copper_ingot",                "default:tin_ingot"},
-        {"default:copper_ingot","microexpansion:steel_infused_obsidian_ingot","default:copper_ingot"},
-        {"default:tin_ingot",          "default:copper_ingot",                "default:tin_ingot"}, 
+  description = "1k ME Storage Cell",
+  capacity = 1000,
+  recipe = {
+    { 1, {
+        {"default:tin_ingot",    "default:copper_ingot",                        "default:tin_ingot"},
+        {"default:copper_ingot", "microexpansion:steel_infused_obsidian_ingot", "default:copper_ingot"},
+        {"default:tin_ingot",    "default:copper_ingot",                        "default:tin_ingot"}, 
       },
     }
   },
@@ -18,64 +45,66 @@ microexpansion.register_cell("cell_1k", {
 
 -- [drive] 2k
 microexpansion.register_cell("cell_2k", {
-	description = "2k ME Storage Cell",
-	capacity = 2000,
-	recipe = {
+  description = "2k ME Storage Cell",
+  capacity = 2000,
+  recipe = {
     { 1, {
-        {"default:copper_ingot","default:steel_ingot",    "default:copper_ingot"},
-        {"default:steel_ingot", "default:obsidian_shard", "default:steel_ingot"},
-        {"default:copper_ingot","default:steel_ingot",    "default:copper_ingot"},
+        {"default:copper_ingot", "default:steel_ingot",    "default:copper_ingot"},
+        {"default:steel_ingot",  "default:obsidian_shard", "default:steel_ingot"},
+        {"default:copper_ingot", "default:steel_ingot",    "default:copper_ingot"},
       },
     },
-    { 1, "shapeless", {"microexpansion:cell_1k","microexpansion:cell_1k"}}
+    { 1, "shapeless", {"microexpansion:cell_1k", "microexpansion:cell_1k"}}
   },
 })
 
+end
+
 -- [drive] 4k
 microexpansion.register_cell("cell_4k", {
-	description = "4k ME Storage Cell",
-	capacity = 4000,
-	recipe = {
-	 { 1, "shapeless", {
+  description = "4k ME Storage Cell",
+  capacity = 4000,
+  recipe = {
+    { 1, "shapeless", {
         "microexpansion:steel_infused_obsidian_ingot", "microexpansion:machine_casing", "microexpansion:steel_infused_obsidian_ingot"
       },
     },
-    { 1, "shapeless", {"microexpansion:cell_2k","microexpansion:cell_2k"}}
+    { 1, "shapeless", {"microexpansion:cell_2k", "microexpansion:cell_2k"}}
   },
 })
 
 -- [drive] 8k
 microexpansion.register_cell("cell_8k", {
-	description = "8k ME Storage Cell",
-	capacity = 8000,
-	recipe = {
-	 { 1, "shapeless", {"microexpansion:cell_4k","microexpansion:cell_4k"}}
-	},
+  description = "8k ME Storage Cell",
+  capacity = 8000,
+  recipe = {
+    { 1, "shapeless", {"microexpansion:cell_4k", "microexpansion:cell_4k"}}
+  },
 })
 
 -- [drive] 16k
 microexpansion.register_cell("cell_16k", {
-	description = "16k ME Storage Cell",
-	capacity = 16000,
-	recipe = {
-   { 1, "shapeless", {"microexpansion:cell_8k","microexpansion:cell_8k"}}
+  description = "16k ME Storage Cell",
+  capacity = 16000,
+  recipe = {
+    { 1, "shapeless", {"microexpansion:cell_8k", "microexpansion:cell_8k"}}
   },
 })
 
 -- [drive] 32k
 microexpansion.register_cell("cell_32k", {
-	description = "32k ME Storage Cell",
-	capacity = 32000,
-	recipe = {
-   { 1, "shapeless", {"microexpansion:cell_16k","microexpansion:cell_16k"}}
+  description = "32k ME Storage Cell",
+  capacity = 32000,
+  recipe = {
+    { 1, "shapeless", {"microexpansion:cell_16k", "microexpansion:cell_16k"}}
   },
 })
 
 -- [drive] 64k
 microexpansion.register_cell("cell_64k", {
-	description = "64k ME Storage Cell",
-	capacity = 64000,
-	recipe = {
-   { 1, "shapeless", {"microexpansion:cell_32k","microexpansion:cell_32k"}}
+  description = "64k ME Storage Cell",
+  capacity = 64000,
+  recipe = {
+    { 1, "shapeless", {"microexpansion:cell_32k", "microexpansion:cell_32k"}}
   },
 })
diff --git a/modules/storage/terminal.lua b/modules/storage/terminal.lua
index a69c567..fba46cc 100644
--- a/modules/storage/terminal.lua
+++ b/modules/storage/terminal.lua
@@ -3,6 +3,7 @@
 
 local me = microexpansion
 local pipeworks_enabled = minetest.get_modpath("pipeworks") and true or false
+local access_level = microexpansion.constants.security.access_levels
 
 -- [me chest] Get formspec
 local function chest_formspec(pos, start_id, listname, page_max, q)
@@ -16,10 +17,10 @@ local function chest_formspec(pos, start_id, listname, page_max, q)
     if listname and net:get_item_capacity() > 0 then
       local ctrlinvname = net:get_inventory_name()
       if listname == "main" then
-	list = "list[detached:"..ctrlinvname..";"
-	  .. listname .. ";0,0.3;8,4;" .. (start_id - 1) .. "]"
+        list = "list[detached:"..ctrlinvname..";"
+          .. listname .. ";0,0.3;8,4;" .. (start_id - 1) .. "]"
       else
-	list = "list[context;" .. listname .. ";0,0.3;8,4;" .. (start_id - 1) .. "]"
+        list = "list[context;" .. listname .. ";0,0.3;8,4;" .. (start_id - 1) .. "]"
       end
       if minetest.get_modpath("i3") then
 	list = list .. [[
@@ -32,8 +33,8 @@ local function chest_formspec(pos, start_id, listname, page_max, q)
 	]]
       end
       list = list .. [[
-	listring[detached:]]..ctrlinvname..[[;main]
-	listring[current_player;main]
+        listring[detached:]]..ctrlinvname..[[;main]
+        listring[current_player;main]
       ]]
       buttons = [[
 	button[3.56,4.35;1.8,0.9;tochest;To Drive]
@@ -64,7 +65,6 @@ local function chest_formspec(pos, start_id, listname, page_max, q)
     buttons = ""
     page_number = ""
   end
-
   return [[
     size[9,9.5]
   ]]..
@@ -96,8 +96,31 @@ local function update_chest(pos,_,ev)
   meta:set_string("formspec", chest_formspec(pos, 1, "main", page_max))
 end
 
+local term_recipe = nil
+if minetest.get_modpath("mcl_core") then
+term_recipe = {
+    { 1, {
+        {"mcl_core:iron_ingot", "mcl_chests:chest", "mcl_core:iron_ingot"},
+        {"mcl_core:iron_ingot", "microexpansion:machine_casing", "mcl_core:iron_ingot"},
+        {"mcl_core:iron_ingot", "microexpansion:cable", "mcl_core:iron_ingot"},
+      },
+    }
+}
+
+else
+
+term_recipe = {
+    { 1, {
+	{"default:steel_ingot",   "default:chest",               "default:steel_ingot"},
+	{"default:steel_ingot", "microexpansion:machine_casing", "default:steel_ingot"},
+	{"default:steel_ingot", "microexpansion:cable",          "default:steel_ingot"},
+      },
+    }
+  }
+end
+
 -- [me chest] Register node
-me.register_node("term", {
+microexpansion.register_node("term", {
   description = "ME Terminal",
   usedfor = "Can interact with storage cells in ME networks",
   tiles = {
@@ -108,14 +131,7 @@ me.register_node("term", {
     "chest_side",
     "chest_front",
   },
-  recipe = {
-    { 1, {
-	{"default:steel_ingot",   "default:chest",               "default:steel_ingot"},
-	{"default:steel_ingot", "microexpansion:machine_casing", "default:steel_ingot"},
-	{"default:steel_ingot", "microexpansion:cable",          "default:steel_ingot"},
-      },
-    }
-  },
+  recipe = term_recipe,
   is_ground_content = false,
   groups = { cracky = 1, me_connect = 1, tubedevice = 1, tubedevice_receiver = 1 },
   paramtype = "light",
@@ -123,6 +139,7 @@ me.register_node("term", {
   me_update = update_chest,
   on_construct = function(pos)
     local meta = minetest.get_meta(pos)
+    meta:set_string("formspec", chest_formspec(pos, 1))
     meta:set_string("inv_name", "none")
     meta:set_int("page", 1)
 
@@ -131,13 +148,38 @@ me.register_node("term", {
 
     local net = me.get_connected_network(pos)
     me.send_event(pos, "connect", {net=net})
-    update_chest(pos)
+    if net then
+      update_chest(pos)
+    end
   end,
   after_destruct = function(pos)
     me.send_event(pos, "disconnect")
   end,
-  allow_metadata_inventory_put = function(pos, listname, index, stack, player)
-    -- TODO: Check capacity, only allow if room
+  can_dig = function(pos, player)
+    if not player then
+      return false
+    end
+    local name = player:get_player_name()
+    if minetest.is_protected(pos, name) then
+      minetest.record_protection_violation(pos, name)
+      return false
+    end
+    local net,cp = me.get_connected_network(pos)
+    if not net then
+      return true
+    end
+    return net:get_access_level(name) >= access_level.modify
+  end,
+  allow_metadata_inventory_put = function(pos, _, _, stack, player)
+    local network = me.get_connected_network(pos)
+    if network then
+      if network:get_access_level(player) < access_level.interact then
+        return 0
+      end
+    elseif minetest.is_protected(pos, player) then
+      minetest.record_protection_violation(pos, player)
+      return 0
+    end
     return stack:get_count()
   end,
   on_metadata_inventory_put = function(pos, listname, _, stack)
@@ -146,6 +188,18 @@ me.register_node("term", {
     me.insert_item(stack, net, inv, "main")
     net:set_storage_space(true)
   end,
+  allow_metadata_inventory_take = function(pos,_,_,stack, player)
+    local network = me.get_connected_network(pos)
+    if network then
+      if network:get_access_level(player) < access_level.interact then
+        return 0
+      end
+    elseif minetest.is_protected(pos, player) then
+      minetest.record_protection_violation(pos, player)
+      return 0
+    end
+    return math.min(stack:get_count(),stack:get_stack_max())
+  end,
   on_metadata_inventory_take = function(pos, listname, _, stack)
     local net = me.get_connected_network(pos)
     local inv = net:get_inventory()
@@ -154,6 +208,9 @@ me.register_node("term", {
   tube = {
     can_insert = function(pos, _, stack) --pos, node, stack, direction
       local net = me.get_connected_network(pos)
+      if not net then
+        return false
+      end
       local inv = net:get_inventory()
       local max_slots = inv:get_size("main")
       local max_items = net.capacity_cache
@@ -174,6 +231,9 @@ me.register_node("term", {
     end,
     insert_object = function(pos, _, stack)
       local net = me.get_connected_network(pos)
+      if not net then
+        return stack
+      end
       local inv = net:get_inventory()
       local leftovers = me.insert_item(stack, net, inv, "main")
       net:set_storage_space(true)
@@ -206,7 +266,7 @@ me.register_node("term", {
     if cp then
       ctrl_inv = net:get_inventory()
     else
-      me.log("no network connected","warning")
+      microexpansion.log("no network connected","warning")
       return
     end
     local inv
@@ -258,8 +318,12 @@ me.register_node("term", {
       meta:set_string("inv_name", "main")
       meta:set_string("formspec", chest_formspec(pos, 1, "main", page_max))
     elseif fields.tochest then
+      if net:get_access_level(sender) < access_level.interact then
+        return
+      end
       local pinv = minetest.get_inventory({type="player", name=sender:get_player_name()})
-      -- TODO: test and fix, net:set_storage_space(pinv:get_size("main"))
+      -- TODO: test and fix
+      -- net:set_storage_space(pinv:get_size("main"))
       local space = net:get_item_capacity()
       local contents = ctrl_inv:get_list("main") or {}
       for _,s in pairs(contents) do
@@ -272,3 +336,7 @@ me.register_node("term", {
     end
   end,
 })
+
+if me.uinv_category_enabled then
+  unified_inventory.add_category_item("storage", "microexpansion:term")
+end
diff --git a/register.lua b/register.lua
index 00d5be6..5ca039b 100644
--- a/register.lua
+++ b/register.lua
@@ -5,90 +5,99 @@
 local me = microexpansion
 local power = me.power
 
+if me.uinv_category_enabled and unified_inventory.registered_categories then
+  if not unified_inventory.registered_categories["storage"] then
+    unified_inventory.register_category("storage", {
+      symbol = "default:chest",
+      label = "Storage"
+    })
+  end
+end
+
 -- [function] Register machine
 function me.register_machine(itemstring, def)
-	-- Set after_place_node
-	local def_afterplace = def.after_place_node
-	def.after_place_node = function(pos, player)
-		if def_afterplace then
-			def_afterplace(pos, player)
-		end
+  -- Set after_place_node
+  local def_afterplace = def.after_place_node
+  def.after_place_node = function(pos, player)
+    if def_afterplace then
+      def_afterplace(pos, player)
+    end
 
-		local meta  = minetest.get_meta(pos)
-		local nodes = me.network.adjacent_connected_nodes(pos)
+    local meta  = minetest.get_meta(pos)
+    local nodes = me.network.adjacent_connected_nodes(pos)
 
-		meta:set_string("infotext", def.description.."\nNo Network")
+    meta:set_string("infotext", def.description.."\nNo Network")
 
-		for _, pos2 in pairs(nodes) do
-			local id = minetest.get_meta(pos2):get_string("network_id")
+    for _, pos2 in pairs(nodes) do
+      local id = minetest.get_meta(pos2):get_string("network_id")
 
-			if id ~= "" then
-				meta:set_string("infotext", def.description.."\nNetwork ID: "..id)
-				meta:set_string("network_id", id)
-			end
-		end
+      if id ~= "" then
+	meta:set_string("infotext", def.description.."\nNetwork ID: "..id)
+	meta:set_string("network_id", id)
+      end
+    end
 
-		-- Trace Network
-		--power.trace(pos)
+    -- Trace Network
+    --power.trace(pos)
 
-		-- Set demand
-		if def.demand then
-			me.network_set_demand(pos, def.demand)
-		end
+    -- Set demand
+    if def.demand then
+      me.network_set_demand(pos, def.demand)
+    end
 
-		if type(def.machine) == "table" then
-			if power then
-				power.add_machine(pos, def.machine)
-			end
-		end
-	end
-	-- Set on_destruct
-	local def_destruct = def.on_destruct
-	def.on_destruct = function(pos, player)
-		if def_destruct then
-			def_destruct(pos, player)
-		end
+    if type(def.machine) == "table" then
+      if power then
+	power.add_machine(pos, def.machine)
+      end
+    end
+  end
+  -- Set on_destruct
+  local def_destruct = def.on_destruct
+  def.on_destruct = function(pos, player)
+    if def_destruct then
+      def_destruct(pos, player)
+    end
 
-		local meta = minetest.get_meta(pos)
+    local meta = minetest.get_meta(pos)
 
-		if meta:get_string("network_id") ~= "" then
-			-- Set demand
-			me.network_set_demand(pos, 0)
-			-- Remove item from network
-			me.network_remove(pos)
-			-- Retrace Network
-			--power.trace(pos)
-		end
-	end
-	-- Set connects_to
-	def.connects_to = {"group:me_connect"}
-	-- Set me_connect group
-	def.groups = def.groups or {}
-	def.groups.me_connect = 1
+    if meta:get_string("network_id") ~= "" then
+      -- Set demand
+      me.network_set_demand(pos, 0)
+      -- Remove item from network
+      me.network_remove(pos)
+      -- Retrace Network
+      --power.trace(pos)
+    end
+  end
+  -- Set connects_to
+  def.connects_to = {"group:me_connect"}
+  -- Set me_connect group
+  def.groups = def.groups or {}
+  def.groups.me_connect = 1
 
-	me.register_node(itemstring, def)
+  me.register_node(itemstring, def)
 end
 
 -- [function] Get machine definition
 function me.get_def(name, key)
-	if type(name) == "table" then
-		local node = me.get_node(name)
-		if node then
-			name = node.name
-		end
-	end
+  if type(name) == "table" then
+    local node = me.get_node(name)
+    if node then
+      name = node.name
+    end
+  end
 
-	local def = minetest.registered_nodes[name]
-	-- Check name and if registered
-	if not name or not def then
-		return
-	end
+  local def = minetest.registered_nodes[name]
+  -- Check name and if registered
+  if not name or not def then
+    return
+  end
 
-	if key then
-		return def[key]
-	else
-		return def
-	end
+  if key then
+    return def[key]
+  else
+    return def
+  end
 end
 
 microexpansion.log("Machine Registration API loaded")
diff --git a/settingtypes.txt b/settingtypes.txt
index c908126..f9fc99f 100644
--- a/settingtypes.txt
+++ b/settingtypes.txt
@@ -1,2 +1,5 @@
 #Stack items in networks higher than their max size.
 microexpansion_huge_stacks (huge stacks) bool true
+
+#Enable the "simple" craft recipes that do not require basic_materials even if basic_materials is present.
+microexpansion_simple_craft (simple craft recipes) bool false
diff --git a/textures/microexpansion_exporter.png b/textures/microexpansion_exporter.png
new file mode 100644
index 0000000..16bfcda
Binary files /dev/null and b/textures/microexpansion_exporter.png differ
diff --git a/textures/microexpansion_gold_wire.png b/textures/microexpansion_gold_wire.png
new file mode 100644
index 0000000..8bb14e6
Binary files /dev/null and b/textures/microexpansion_gold_wire.png differ
diff --git a/textures/microexpansion_importer.png b/textures/microexpansion_importer.png
new file mode 100644
index 0000000..d6069b9
Binary files /dev/null and b/textures/microexpansion_importer.png differ
diff --git a/textures/me_interface.png b/textures/microexpansion_interface.png
similarity index 100%
rename from textures/me_interface.png
rename to textures/microexpansion_interface.png
diff --git a/textures/microexpansion_logic_chip.png b/textures/microexpansion_logic_chip.png
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diff --git a/textures/microexpansion_ore_supernatet.png b/textures/microexpansion_ore_quartz.png
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rename from textures/microexpansion_ore_supernatet.png
rename to textures/microexpansion_ore_quartz.png
diff --git a/textures/me_quartz_crystal.png b/textures/microexpansion_quartz_crystal.png
similarity index 100%
rename from textures/me_quartz_crystal.png
rename to textures/microexpansion_quartz_crystal.png
diff --git a/textures/microexpansion_security_bottom.png b/textures/microexpansion_security_bottom.png
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diff --git a/textures/microexpansion_security_front.png b/textures/microexpansion_security_front.png
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diff --git a/textures/microexpansion_upgrade_base.png b/textures/microexpansion_upgrade_base.png
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diff --git a/textures/microexpansion_upgrade_bulk.png b/textures/microexpansion_upgrade_bulk.png
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diff --git a/textures/microexpansion_upgrade_control.png b/textures/microexpansion_upgrade_control.png
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diff --git a/textures/microexpansion_upgrade_filter.png b/textures/microexpansion_upgrade_filter.png
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diff --git a/textures/microexpansion_upgrade_regulation.png b/textures/microexpansion_upgrade_regulation.png
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