Help! My tail 'twitches' now!

I was afraid of this - I tweak the factory settings, help one problem but cause another! [:@]


I followed the book and made small adjustments. But first, a brief hover to make sure everything was the same as last time. It was. She yaws the left gently but firmly and I must compensate with right stick, and right rudder trim is MAXED out.

Fine. I shut her down and tweaked the bottom pot - and the tail was staying put, but 'twitching'!!

Ok, I tried putting it back. She again yaws left but the tail is still twitching! [:'(]

I tried shutting down, putting the rudder trim back to zero - now she yaws left REALLY hard and is still twitching.

Fine. Shut down again, and tweaked bottom pot again. Tail again stays straight without stick input, but is still twitching!

Fine. Shut down again, and started playing with the gyro gain, middle pot. No effect. I went back and played with different settings - full left and full right - no change in the twitching, although when the setting is max clockwise it twitches even more.

Help! Is my 3-in-1 board bad? It seems to ignore the Gyro Gain pot adjustment...

I also tried re-binding the AR6000 to the DX6 radio. Fine but no change in the 'twitching' problem.

Help! I'm bummed now The only good news is that the left stick is trimmed out fine - it can hover hands off if not for the tail.