Worm gearbox

This is a small gearbox with a 10:1 ratio based on [syvwlch](http://www.thingiverse.com/syvwlch/about)'s threaded library and example made smaller for quicker printing. The cage is only 32mm tall.

OpenSCAD source is included and almost everything is parametric so you can change the number of teeth for a different gear ratio and the cage will automatically resize itself to fit.

The shafts are standard M2 cocktail sticks.