About this 3D model

Redrawn with several modifications to suit my particular build. - Suit M4 captive nuts - Gear teeth remodelled: 1.5 Module, 25deg helix angle, 41 teeth - 3 locking screws so they can be better adjusted on the shafts - More substantial hubs and webs for improved strength - Flipped the driven gear so they both sit the same way round on the shafts - Generally tidied up the geometry