I replaced the feathering shaft with no improvement. I did see that my thrust bearings need replacing. I'm not sure what was meant by "check my servos to see if one is playing up"? I did remove the blades and ran the motor up. The swash is pitching to the left on run up. It really seems like there is I put being made somehow. I have a DX9 and have my trim tabs disabled. I also checked for any sub trim.