Updated "Replicator 2 Extruder Upgrade" move the bottom spring support so that I could use the spring from a clothes peg (clothespin)

I couldn't get hold of the recommended spring, So I did a quick hack in OpenSCAD to move the spring mount closer to the arm and use a clothes peg spring instead.

I had initially expected to find traditional wooden pegs with a lever-arm spring: http://en.wikipedia.org/wiki/File:Clothespin-2459e.jpg I thought I would have to design the mechanism from scratch, imagine my delight when I found this modern peg with a spring of just about perfect size.
http://commons.wikimedia.org/wiki/File:Red_clothes_peg.jpg

All I had to do was clip out the spring support and move it up a bit. marvellous!

Go and steal a spring from the clothes line...