Tonight we tried my Shuttle with a new receiver. No improvement. We also tried making the tail belt a bit looser. Again, no better.

Next I'm going to try swapping out my collective servo (Hitec 605bb), and we're going to try a different Tx (though that seems an unlikely cause as the glitches are only occuring when the head's spinning).

I think I'll also strip the main parts of the model to check bearings etc.

This problem is really getting me down. Its four weeks since I flew properly. I should be on forward flight and nose-in by now, but I'm still just hovering because I'm not getting any time on the sticks (well, apart from the sim that is). :cry: