diff --git a/follow_focus.py b/follow_focus.py
index c6b4507..5224199 100644
--- a/follow_focus.py
+++ b/follow_focus.py
@@ -42,6 +42,7 @@ gear_thinkness=10
 
 # Other
 mount_gap=2
+support_radius=11/2
 
 # Calculated values
 lid_thicknesss = (part_thinkness-gear_thinkness)/2
@@ -145,17 +146,16 @@ lid = lid.faces('>Z[1]').workplane().center(stepper_center[0], -stepper_center[1
 lid = lid.faces('>Z[0]').workplane().circle(5/2).cutThruAll()
 
 base = base.faces('<Z[1]').workplane().center(21,20.15).circle(26.5).cutBlind(-gear_thinkness-gear_gap)
-t=11/2
-base = base.faces('<Z[2]').workplane().hLine(t, forConstruction=True)\
-                                      .threePointArc((-t,-t/2),(0,t))\
-                                      .polarLine(t, -slant_degree)\
+base = base.faces('<Z[2]').workplane().hLine(support_radius, forConstruction=True)\
+                                      .threePointArc((-support_radius,-support_radius/2),(0,support_radius))\
+                                      .polarLine(support_radius, -slant_degree)\
                                       .close().extrude(-lid_thicknesss+wall_width)
 base = base.faces('<Z[2]').workplane().circle(large_gear_diameter/2-gear_offset).extrude(gear_thinkness/2)
 base = base.faces('<Z[2]').workplane().circle(m3_tap/2).cutBlind(-part_thinkness/2+wall_width)
 
 # Threaded insert
-base = base.faces('<<Y[-1]').workplane().center(-5,0).circle(6.5/2).cutBlind(-t-mount_gap*2-6)
-base = base.faces('<<Y[-1]').workplane().circle(8.5/2).cutBlind(-t-mount_gap)
+base = base.faces('<<Y[-1]').workplane().center(-5,0).circle(6.5/2).cutBlind(-support_radius-mount_gap*2-6)
+base = base.faces('<<Y[-1]').workplane().circle(8.5/2).cutBlind(-support_radius-mount_gap)
 
 # Fastener
 base = base.faces('<<Y[-1]').workplane().circle((fastener_width+1)/2).cutBlind(-4)
@@ -172,9 +172,9 @@ fastener = fastener.faces('<<Y[-6]').workplane().circle(5/2).cutThruAll()
 
 # Lid large gear mount point
 lid = lid.faces('>Z[0]').workplane().center(21,-20.15)\
-                                    .hLine(t, forConstruction=True)\
-                                    .threePointArc((-t,t/2),(0,-t))\
-                                    .polarLine(t, slant_degree)\
+                                    .hLine(support_radius, forConstruction=True)\
+                                    .threePointArc((-support_radius, support_radius/2),(0,-support_radius))\
+                                    .polarLine(support_radius, slant_degree)\
                                     .close().extrude(-lid_thicknesss+wall_width)
 lid = lid.faces('>Z[0]').workplane().circle(large_gear_diameter/2-gear_offset).extrude(gear_thinkness/2)
 lid = lid.faces('>Z[0]').workplane().circle(2).cutThruAll()