[suicideneil]

Its not the drill or batteries that matter, since you supply them yourself; you could easily bolt a dirty great big outrunner and a 10s lipo pack on there, just have to improvise a motor mount & throttle controller. Its the fact its a bolt on drive unit, the design of which is very clever and could easily be reproduced in a much cheaper and tidier package ( IE: not with a cordless drill sticking out the back like a sore thumb). A 90* gear box and a drive sprocket is all it is really...