Hi All, I fitted the complete Extreme core and used Xtreme blades about 2/3 weeks ago - it works a treat, good hover and FFF.

However! the last couple of days the tail has developed a twitch when its in a stable hover - its as if its waging its tail like a dog. It moves about 1/2" clockwise then 1/2" anti-clockwise but fast??!! The twitching stops when I apply more power or move forward/backward/side-to-side.

It’s as if something is binding, I've checked both shafts and they are not too tight, the screws through the outer shaft don’t seem to be touching the inner. Shafts are straight and the blades and flybar are balanced and free moving.

I forgot which way up the washer on the bottom of the outer shaft goes (flat side down or flat side up?!) but I’ve tried it both ways and it does make a difference to the twitch.

Any ideas what could be causing it?! Bad bearing? Dodgy swathplate?