About 18 months ago we embarked on a journey to paint the plane (C Model). We did all the prep work ourselves to include the sanding and stripping of the control surfaces. Our friend painted it (he's experienced in aircraft painting) and it turned out beautifully. Except the control surfaces wouldn't balance. More specifically, the elevators and rudder won't balance. The ailerons were no issue and are back on the plane. We re-stripped the control surfaces thinking maybe there was too much paint