TopOpt Prusa Spool Holder

Remixed from http://www.thingiverse.com/thing:45930
Topology optimization with topy: https://code.google.com/p/topy/
Video of the optimization process: http://youtu.be/LTsEBuIUHTA
Updated: dxf and scad files, smoothed and thresholded to get a nicer part.

I like the quick release version by mrwolfe too, so I added an stl in that style.