I picked up a used MR-01 yesterday and it ran fine. We used it alot last night and this morning and around noon my son told me it would only go in reverse. Further test revieled this to be true. I tried a different transmitter and used the stock Perfex transmitter for my MR-02. There does not seem to be a TX problem. The car has an X-speed V motor with no other upgrades. Are my electonics fried? A secoundary question is, can I switch the motor wires and will the motor run in reverse? So I have forward only instead of reverse only? Help would be greatly appreciated.