I've seen these airplane motors that are brushless DC motors capable of 120,000 rpm. Is that going to work for a cnc machine? I mean the torque is not huge but compared to a dremel it seems close or even better but at a much lighter weight and lower cost($30 vs $80). When I saw the high rpms I thought it would be good for some other applications. I also don't really understand how to buy a collet for one of these. It's just a 3mm shaft with nothing to put a bit into so you have to buy this extra piece.