I fly aP2 with lightbridge. I fitted cf props and flew no problem for several months . Then the P2 started surging up and was impossible to control vertically . Had to switch to Atti mode to get the P2 down and even then it was very unpridictable. Did IMU calibration which it needed but this did not improve things. Checked compass connection etc and repeated flights but impossible to fly . Was about to strip everything down and see if the IMU was loose but thought I'd just try a set of standard of DJI. Props. The difference was unbelievable the P2 was back to normal. I inspected the cf props closely , couldn't see anything wrong. No chips, cracks or damage. Cannot work out what happened but really surprised that the props were the problem