Herringbone Gears for Robo3D R1

UPDATE 2016-03-12 - I renamed the 2nd version of the small gear, which has the larger shaft hole to "Herringbone_Gears_-_Small_v2.stl" to clear things up a bit.
I've also added "Herringbone_Gears_-_Small_v3.stl" which tightens the hole up by about .15 mm to make a closer fit.

UPDATE 2016-03-09 - I've included a v2 SCAD file and small gear with widened shaft hole (still for dual flat shaft) that should make fitting easier.

UPDATE 2015-04-22 - I've updated this by enlarging the teeth on the