lol MAN i use a cordless drill for my rotostart and it is 750rpm and i found it is not fas enough... i tryed and prove my point... i threw my engine into my vice and tryed to start it with the plactic rotostart part on it... (geared part) and i had no luck... i took it off and had the 1 way bering and got a drill bit that would fit a 6mm hex (one for a rattchet) and it started up right away! so i will be geting the hpi rotostart 2 just wand one...