Tetrahedral racks
YOUR LINK HERE:
http://youtube.com/watch?v=sDJk-9QxFro
This is joint work with Saul Schleimer. • Order from Shapeways: http://shpws.me/MCng, http://shpws.me/MCnf • Download from Thingiverse: http://www.thingiverse.com/thing:1739545
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