From a8f373ebdb262d84e4820ec1b5ff43bba7d9cf48 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 1 Aug 2015 23:59:44 +0100
Subject: [PATCH] pull-cord-keeper: screw hole

---
 pull-cord-keeper.scad | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/pull-cord-keeper.scad b/pull-cord-keeper.scad
index 258e3e8..4812465 100644
--- a/pull-cord-keeper.scad
+++ b/pull-cord-keeper.scad
@@ -24,6 +24,8 @@ backxgap = 1;
 
 blockoverlapcnr = 5;
 
+screwholedia = 4 + 0.5;
+
 module Oval(centredist, rad) {
   hull() {
     translate([-centredist/2,0,0]) circle(r=rad);
@@ -45,9 +47,15 @@ module Hoop(){
 }
 
 module Positive(){
-  translate([0,0, -height/2])
-    linear_extrude(height=20)
-    Hoop();
+  difference(){
+    translate([0,0, -height/2])
+      linear_extrude(height=20)
+      Hoop();
+
+    rotate([90,0,0])
+      translate([0,0,-50])
+      cylinder(r=screwholedia/2, h=100);
+  }
 }
 
 module Ribs(){
-- 
2.30.2