Snap fit linkage

Customizable link that can snap into and around bearings. Combine them to make linkages, like the four bar linkage shown. Use the thingiverse customizer to change the length, or open the file in OpenSCAD (http://www.openscad.org/), change the LINK_LENGTH constant at the top of the file, render it, then export it as STL.

The linkage pictured has lengths 15, 45, 45, and 60 mm.

I designed it for 608 abec bearings: https://www.google.com/search?q=608+abec+bearings