I have purchased 2 Duratrax Evaders (Electric)for my son and I. I have some question for you: 1. first what do you think of this RC car. Keeping in mind they are just for use on our property. 2. I have been having a hard time keeping the brushes on the motor working. The brushes keep sticking which causes the motor to stop working. Is there some kind of lub that I can put on the brushes? 3. Is there a better transmission? 4. Is there ways to increase the speed, power? 5. Any other tricks about electric motors that would help keep the cars running better? Thanks for your time and suggestins.