SerpentD- Exactly- It made me stop and think, as we use rollout or final drive ratios to calculate car performance, but didnt take into equation the size of the comm (but as you say it doesnt affect the gear ratio) i'll be glad when I go brushless, questions like this wont be popping into my mind hehe

CCristo- Yes, brush wrap changes the rpm band, i'm glad i'll be rid of that too