Servo tilt angle makes a difference.
My mount was rather shallow angled. If I had to do it again, I would have spent more time bending a greater angle in the mount before riveting. Because of that, I had to lengthen the actuator arm cut out slot in the bottom aileron skin. Shallow angle equals longer slot. Steeper angle equals shorter slot. Either ways is ok. If the arm touches the skin at full deflection, just file the slot longer to avoid contact. Don't be too concerned about total overall movement up and down. In reality, you won't use the full deflections. At least that's what I'm told. Something like 10 degrees either way will do what you want. Make sure your threaded rod is more than half way into each clevis before you lock it with the nuts. On the trim tab, I had trouble keeping one of the rotating cotter pins, which secures the hinge pin in place, from contacting the aileron skin during full deflection as the hinge eye rotated. Finally got it after bringing one leg over and into the end of the hinge eye where it tucked into the 1/8 inch empty space, and the other wrapped tight around the hinge eye. No real problems with the electric operation.
