If you use a 3 pigtailed power switch, Battery, ESC, and 1 parallel on the battery side. You charge up the battery before you turned off the switch. Giving voltage to the servo,buning the board in servo. It does that especially the steering servo. With the throttle it would chatter. by then you turn it off. Steering servo is really sensitive with it, really fast. end up replacing the servo.

live and learn I did that once, didn't do it again after. Can easily change metel gears and cases, but I don't see board replacement on their website.