change intro region to absolute minimum size

The previous shape created small fins the easily break: a small force
on the payload is levered to a large force on the fin.

1 files changed, 6 insertions, 2 deletions

diff --git a/gimbal.scad b/gimbal.scad
index 05db4a8..d16f6e0 100644
--- a/gimbal.scad
+++ b/gimbal.scad
@@ -100,8 +100,12 @@ module shell() {
 	}
 	
 	// add intro region
-	translate([0, 0, d])
-	cube([d-2*cutoff, d*2, 2*d], center=true);
+	intersection() {
+		cylinder(r=d/2, h=2*d);
+
+		translate([0,0,d])
+		cube([d-2*cutoff, d*2, 2*d], center=true);
+	}
 
 	// path for 1/4" screw; lets you rotate the sphere after
 	// pushing it in (and allows later removal of it)