64:1 Gearbox v.2.0

This 64:1 gearbox is inspired by the Tamiya gearboxes, which are nearly all-plastic construction but work great all the same. This hasn't been printed out before.

For use with the Mabuchi DC motors:
http://www.allelectronics.com/make-a-store/item/DCM-296/SMALL-DC-MOTOR-MABUCHI/1.html

There is a 3D model of this motor in the .blend file.

Edit! I'm getting reports of gears not meshing at this size from the MakerBot team, and scaling up this design 'till they do puts the frame outside the bounding box. I've got some ideas, though, so hang in there. Meanwhile, anyone with good enough resolution to get gears to mesh at this size (or 2x for that matter) should still be able to get this working.

Notes on 2.0: Despite this thing being mechanically identical in nearly every way to the previous versions, version 2.0 has been re-built in Blender from the ground up. More importantly, a clip has been added to connect a DC motor to the gearbox. The above link should take you to a s