Screwless Cube Gears

UPDATE: This design has been superseded by my newer version, http://www.thingiverse.com/thing:213946, which has better pins (and more gear ratio options). I highly recommend you print that instead, as it prints more reliably, assembles much easier and holds together better.
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Thank you, all of you who've made cube gears and posted pictures. Since tbuser made these lovely pin connectors, http://www.thingiverse.com/thing:10288, I figured it was high time to make a fully printable cube gear set. Now you needn't bother buying any more screws: this one snaps together.

UPDATE: For anyone without access to a 3D printer, you can now buy these from caesia on her Etsy store: http://www.etsy.com/shop/PlasticFusion

UPDATE: New version uses tbuser's new pin connectors V2: http://www.thingiverse.com/thing:10541, is much stronger, and prints right-side-up. This is practice for making a heart-gear version.

This design also incorporates a couple of tricks that others may f