it could be done nicely with an x-factor, if you come up with some way to gear it way down(like topping out at 12mph) then the power would amaze, specially if it was a four stroke, also, ever watch a temp gauge on a nitro running low rpm, they drop, when not over half throotle(with proper gearing youd never need more) the temps will drop even moving very slowly, i cool my t-maxx down when it gets to hot by driving very slowly and letting it idle(sounds like crawling to me) would it be a challenge, yeah, would it cost alot, yeah probably, would it be the sickest looking and sounding thing to hit crawling, quite possible...