A friend of mine who recently purchased 3 used Rustlers for like $50 is wanting to hop one of them up. I know very little about the Electric side of the Rusty as all the Rcs I own are Nitro powered. I am not sure how old they are as I havent seen them yet, but he is wanting to know what all it would take to get it closer to the 45mph range. So I will post more when I find out more. I told him the easiest way to go would be to put a different Motor in it and change his gearing, is that correct? I also dont know if there is for lack of a better term a cut off on how old one can be and still have the newer motors still mount up. So any suggestions will be greatly appreciated.