I just bought a Enforcer 55 magnum got done building it the other day. I put the electronics in and when I turn on the reciver power the servos go crazy till I turn on the radio. They move very fast and all over the place. Once I turn on the radio everthing is normal. I have an fm radio and don't understand why it goes so crazy with the radio off. My friend bought a blackjack 55 and has it in my garage and when he turns his radio off his servo's don't go all crazy. What gives? His has an fm radio that came with his, why does my radio have so much interference?