Hi, Tried to fly my P2 this afternoon and the initial throttle response after CSC and initialisation would not give me enough power to take off. This has been getting progressively worse over the last few weeks. I'd say Its been happening once in every 4 or 5 flights but today its not taking off no matter what I do. There is some increase in motor speed when the throttle is pushed forward but not enough to lift off. Things I've tried so far --------------------------- Calibration of the transmitter in the RC assistant. Calibration of transmitter in the P2 assistant. Tried different batteries in the P2 and transmitter. IMU basic and advanced calibration. My P2 has never been crashed or damaged. I have not changed anything with regards setup or configuration for months. Everything has been fine but recent weeks has seen this problem develop into a condition that has now grounded my P2. Cant think of anything else. Anyone had this before ?