Portx that's 100% the truth man. I run a 7.5 on a larger track with the punch turned wayyyyyy down for the tight stuff so I can still be smooth but have the top end I want on the long straights. At a smaller track I run at I use a 17.5 in the mod buggy class and I've NEVER been out motored or failed to be on the podium due to the little motor. A smaller track is all about corner speed and smooth throttle over power and I've won mod buggy with a 17.5 there. Huge tracks are a different story though of course.