I had an issue with Hitec 645MG servos in my 1/10th electric truck blowing motors and kicking back to my ESC, not once but twice. Unfortunately I'm not enough of a wiring guru to understand why or how a bad motor in a servo goes all the way back through the receiver and smokes the ESC...since then I've switched to Futaba servos (to match with my Futaba ESCs) and problem solved