I have yet to loose a servo on the throttle on any of my gas or glow planes due to vibration, unless the engine was mounted on rubber or comes loose the servo is going to move just as much as the engine will and if the end points are adjusted correctly theres no pressure at either end point there shouldn't be any issues. I keep my throttle servo as close as possible to the carb. I do agree that a digital MG servo would be a good investment for obvious reasons. But 333 oz of torque is not only overkill it also adds more weight to the plane. Whats next a sailwench servo ?????