[AustinSchuh]

For the last 2 years, we have bought the replacement parts for the Andy Mark 2 speed gearboxes and then made our own gearboxes from those. We tend to integrate the gearbox into the frame, use 2 CIMs per side, and direct drive the middle wheels of our 6 wheel drive base. We go with AM because most of the hard work hex broaching the gears and making the dog pattern is already done. And everything just works.

Off the top of my head, I would guess 6fps and 11fps.