I reached Horizon Hobby support this afternoon, and didn't get the same nice response as I did a few weeks ago. They couldn't offer anymore help or advice other than try to get someone else to fly my heli to help diagnose the problem. I might try a Telebee Gyro (I have a spare one) to see if it makes a difference. I won't try my new JR770 3D gyro - that's reserved for my HK450
