Ok, so this has probably been tackled a million times here, but its my first day here, so any help is much appreciated.

I just replaced the bottom blade pivot on my co-comanche and when I put it back together it started "drifting" significantly to forward and to the left.

I have already tried calibrating the controller to compensate and also turned it off and on in various combos (copter then control, control then copter) and it still does it.

I'm wondering if maybe the electric steering pinon (i have no idea what to call any of these parts) that controls the motion of the bottom blade set is screwed up or what?

Any help is great.