1 files changed, 3 insertions, 5 deletions

diff --git a/another.scad b/another.scad
index 0f696cc..05bfab3 100644
--- a/another.scad
+++ b/another.scad
@@ -422,10 +422,8 @@ module the_extruder(
    }
    difference() {
-    union() {
-     cylinder(d1=gearbox_d-2*ch,d2=gearbox_d,h=ch+epsilon,$fn=fnd*gearbox_d);
+    hull() {
+     cylinder(d=gearbox_d-2*ch,h=knob_h,$fn=fnd*gearbox_d);
      translate([0,0,ch])
-     cylinder(d=gearbox_d,h=knob_h-2*ch+epsilon,$fn=fnd*gearbox_d);
-     translate([0,0,knob_h-ch])
-     cylinder(d1=gearbox_d,d2=gearbox_d-2*ch,h=ch,$fn=fnd*gearbox_d);
+     cylinder(d=gearbox_d,h=knob_h-2*ch,$fn=fnd*gearbox_d);
     }
     for(a=[0:360/knob_indents:359]) rotate([0,0,a])