RE: Radio Controler
Switching the positive and negative leads on a servo is almost guaranteed to burn out the amplifier and has nothing to do with the direction of servo travel. To reverse a servo you must modify the innards by switching the two leads to the motor from the amplifier and interchange the two outside leads on the feedback potentiometer, a task difficult to do on modern servos with surface mount components. Different brands of servos travel in opposite directions. For instance Futaba and Hitec travel in opposite directions with the same servo input.