Spring loaded retractable measuring tape

I had a spring loaded retractable measuring tape which stopped working. After trying to get it to work I figured I might as well take it apart. After all, a spring loaded retractable measuring tape that doesn't retract is just a bulky measuring tape. It turned out several small plastic components inside had broken and were now either so destroyed I couldn't measure/replicate them or were just plain missing.

Version 1: Uploaded 2010-02-02
http://makerblock.com/2010/02/retractable-tape-measure-reloaded/

Version 0: Uploaded 2010-01-30
http://makerblock.com/2010/01/new-print-retractable-measuring-tape/

For a larger picture and a little more detail, visit my blog at http://www.makerblock.com

First I designed a small flat open ended cylinder which would hold the metal spring. It had to have two notches - one notch to hold the end of the tape measure and another to hold the outer-most end of the metal spring.

Then I designed a plastic holder for the small flat cylinder to