diff --git a/techpack_stairway/models/techpack_stairway_slope.obj b/techpack_stairway/models/techpack_stairway_slope.obj
index 57298d7..f96e575 100644
--- a/techpack_stairway/models/techpack_stairway_slope.obj
+++ b/techpack_stairway/models/techpack_stairway_slope.obj
@@ -1,8 +1,8 @@
 g top
-v 0.500000 0.500000 0.500000
-v -0.500000 0.500000 0.500000
-v -0.500000 -0.500000 -0.500000
-v 0.500000 -0.500000 -0.500000
+v 0.498000 0.498000 0.498000
+v -0.498000 0.498000 0.498000
+v -0.498000 -0.498000 -0.498000
+v 0.498000 -0.498000 -0.498000
 vt 1.0000 1.0000
 vt 0.0000 1.0000
 vt 0.0000 0.0000
@@ -11,10 +11,10 @@ vn 0.0000 0.7071 -0.7071
 s off
 f 2/1/1 1/2/1 4/3/1 3/4/1
 g bottom
-v -0.500000 -0.500000 0.500000
-v 0.500000 -0.500000 0.500000
-v -0.500000 -0.500000 -0.500000
-v 0.500000 -0.500000 -0.500000
+v -0.498000 -0.498000 0.498000
+v 0.498000 -0.498000 0.498000
+v -0.498000 -0.498000 -0.498000
+v 0.498000 -0.498000 -0.498000
 vt 0.0000 0.0000
 vt 1.0000 0.0000
 vt 1.0000 1.0000
@@ -23,9 +23,9 @@ vn 0.0000 -1.0000 -0.0000
 s off
 f 6/5/2 5/6/2 7/7/2 8/8/2
 g right
-v -0.500000 0.500000 0.500000
-v -0.500000 -0.500000 0.500000
-v -0.500000 -0.500000 -0.500000
+v -0.498000 0.498000 0.498000
+v -0.498000 -0.498000 0.498000
+v -0.498000 -0.498000 -0.498000
 vt 1.0000 1.0000
 vt 0.0000 0.0000
 vt 1.0000 0.0000
@@ -33,9 +33,9 @@ vn -1.0000 0.0000 0.0000
 s off
 f 9/9/3 11/10/3 10/11/3
 g left
-v 0.500000 0.500000 0.500000
-v 0.500000 -0.500000 0.500000
-v 0.500000 -0.500000 -0.500000
+v 0.498000 0.498000 0.498000
+v 0.498000 -0.498000 0.498000
+v 0.498000 -0.498000 -0.498000
 vt 0.0000 1.0000
 vt 0.0000 0.0000
 vt 1.0000 0.0000
@@ -43,10 +43,10 @@ vn 1.0000 0.0000 0.0000
 s off
 f 12/12/4 13/13/4 14/14/4
 g back
-v 0.500000 0.500000 0.500000
-v -0.500000 0.500000 0.500000
-v -0.500000 -0.500000 0.500000
-v 0.500000 -0.500000 0.500000
+v 0.498000 0.498000 0.498000
+v -0.498000 0.498000 0.498000
+v -0.498000 -0.498000 0.498000
+v 0.498000 -0.498000 0.498000
 vt 1.0000 1.0000
 vt 0.0000 1.0000
 vt 0.0000 0.0000