Drive motor options

[Ellis]

The problem with coupling a more powerful motor to the gearboxes, which would be possible with an adapter plate of some sort, is the added torque and power going through the gearboxes. They won't last long, with enough resistance to almost burn out a motor on the output, and a motor that will just keep on spinning on the input, I imagine the drill internals will get eaten.

You may need to look into some 775 16:1 Banebots motors and gearboxes, or similar. They aren't cheap (US-only, too) but they'll be more suited to the job. The gearboxes are also roughly 40x40, so with some new bolt holes they might be able to just drop in. Whether they'd arrive soon enough for you, I don't know. For similar money there's the Magnum 775s, also US based.