I have a UMX A-10 with an odd servo problem. When I move the rudder stick, about half of the time the servo will go in the desired direction but will stick for a bit, come back, and then will usually start jittering like crazy. I also noticed that the servo motor becomes EXTREMELY hot. Other times it works without a problem. I bought the plane used, but it was in great condition. I have wrecked it about half a dozen times. I also get an abnormal number of fades and hold. With that being said, I'm not sure if it's the servo or if it's the Rx/ESC. Any help would be appreciated.