I'd be interested in any drawings (rough, polished, what you've put up already even) for a future project. I have one of the older clutch Tamiya KT kits and am planning on putting HL gearboxes and electronics to make it dual drive with some sound, but figure the weight of the KT with metal tracks would be hard on the board. Lower gearing, more torque, and a more scale speed would be nice!
No hurry though, I won't get to it for a bit.

Cheers,
David