Update.

I checked the linkage. Pretty solid from the servo to the control horn. Rule flexing out... at least for now. Next, I checked to see if there was any slop in the linkage anywhere. Nope, none. Nice and tight. The servo is my next option.. if it is not strong enough for this application. Have not yet swapped them out, but I do have a higher torque Hitec to put in the place of the existing H55 servo.

Dave, at our LHS, suggested that the elevator, by design, may be flexing in high-G maneuvers... meaning that it may warp or twist 'under load' causing what I described. He suggested that the elevators are pretty small by nature and not well reinforced internally (again by design to keep it light) and that I may be asking for more than the plane is capable of giving. If the servo does not fix the problem, then I will have to assume it's a design issue and leave it at that. I can still fly it this way, no big deal, I just have to slow it down a tad and take some of those possibly excessive G forces out of the equation.

DS.