From 679bd0cf55cccf899298090493c9e0e64a90d932 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Thu, 1 Sep 2016 19:27:00 +0100
Subject: [PATCH] lock-inframe-bracket: Provide tube_rear_extra_th

---
 lock-inframe-bracket.scad | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lock-inframe-bracket.scad b/lock-inframe-bracket.scad
index 6f33a11..bdd8660 100644
--- a/lock-inframe-bracket.scad
+++ b/lock-inframe-bracket.scad
@@ -30,6 +30,8 @@ $fn=50;
 
 join_cr = 7;
 
+tube_rear_extra_th = 1;
+
 // calculated
 
 lockshaft_r = [1, 1] * lockshaft_dia / 2;
@@ -78,7 +80,11 @@ module JoinCircs(jr){
 module MainPlan(){
   difference(){
     union(){
-      circle(r = tube_or);
+      hull(){
+	for (t=[0, tube_rear_extra_th])
+	  translate([0, -t])
+	    circle(r = tube_or);
+      }
       translate([-back_ohw,0]) mirror([0,1])
 	square([back_ohw*2, backflange_ymin]);
 
-- 
2.30.2