I have a buggy, volcano, and a lightning. my buggy turned into a parts car :-( but the most common problem I am finding is that my gas break servo has gone out on me 3 times. after getting about 3 to 4 tanks in the lightning the servo stuck and caused the car to run into a wall. this was not good, because I didnt have a fail safe on. But since then 2 more have not worked correctly. Any ideas for upgrades on servos? And if this is a problem for anyone else?