Hi guys, Im having exactly the same prob, however, it occurs with the engine runnning, or off....I have replaced the RX's, the TX's the crystals, the batteries....no luck whatsoever. It only occurs when I move approx 6-10 ft away from it with the Tx. Sometimes when I come near to it with a glow starter, the vibrations on all the servos gets worse. It flew fine for 10 flights, and all of a sudden, without even shutting down, i turned it around and took off again, and went all over the sky as all the servos were going crazy. Pleeeeze help