RE: Snatching tail rotor
Think I have possibly fixed it. The set screws in the tail rotor hub. I was able to tighten them about what I think is a turn each. They were well locked in place with loctite. Removed the tail grips and the locknuts and was able to screw the set screws in. There is still a touch of slop even now though. Also, I tightened the blades cos I think the snatching may have been a whiplash effect. Tried it today in this gorgeous weather and seems to have completely cured the problem.