Originally Posted by Jared

I wouldn't worry about the cantilevered gears too much. We had problems when we cantilevered gears on our output shaft, but we had no issues cantilevering our 2nd stage of reduction (30t to 56t gears). The gears cantilevered on this gearbox are rotating quickly so they have less torque, and less force on the shafts than a cantilevered gear on the output shaft.

The only thing I'd worry about is the four gears (pinion, two idlers, and one more) that are engaged in a square. That center pinion might not fit in there. If it engages with one gear, the other gear may never line up. Unless you've designed for it, both gears that engage with the center pinion could always be slightly misaligned.