Thanks for the explanation, ptulmer. That makes sense.

I believe what happened is this: I thought you were saying there would be no impact UNTIL up elevator, but what in fact you're pointing out is that, prior to up elevator, any impact would be (for the most part) seen in the roll axis (which could be trimmed), but once up elevator is applied (and only at that time), the impact will be seen on both roll and yaw axes, which could not be trimmed since trim affects the plane in all flight conditions.

FWIW (not much, I know ) I agree...and I was unclear as well when suggesting it could be 'trimmed out'. I should have been more correct and suggested that issues could be 'mixed' out. As you say, any minor roll effect in straight line flight COULD be trimmed (though, again in agreement with you, if it's noticably out of whack in straight line flight, that's a pretty big issue). The induced yaw could be MIXED out by adding a touch of opposite rudder in with up elevator...something not unusual, given that many pilots do this to reduce the impact of torque and/or p-factor when pulling to an aggressive upline.

I still, however, submit that on a 40 sized plane, a 1/4" difference (if, truly, the angle is that small) will probably be insignificant in all but the most aggressive of flying conditions. In either case, were it MY plane, I'd be inclined to fly it a few times first before going through the annoyance of R&R that stab. (presuming, again, that the angle is as small as he suggests)