From 8141baf7df063e911e4aa57d522392854d814760 Mon Sep 17 00:00:00 2001
From: Jan Huwald <jh@sotun.de>
Date: Thu, 22 Jan 2015 11:11:05 +0100
Subject: add option to remove sphere and ease insertion


diff --git a/gimbal.scad b/gimbal.scad
index 078a055..0227c63 100644
--- a/gimbal.scad
+++ b/gimbal.scad
@@ -42,6 +42,14 @@ module shell() {
 	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)
+	hull() {
+	    cylinder(r=screw_dia/2, h=d);
+	    rotate([90, 0, 90])
+	      cylinder(r=screw_dia/2, h=d);
+	}
+	
 	// mounting screw hole
 	assign(rs=mount_screw_dia)
 	assign(rh=mount_screw_head_dia)
-- 
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