I cutout the aileron servo mount in the wing after I had the servos mounted in the fuselage so I could plan the space needed for the clearances. After cutting the opening for the aileron servo I lined the opening with 1/64” plywood and then made the plywood servo mount.

You may have noticed that the pivot point on the aileron connecter linkage wire is forward of the aileron wire and hinge line and would normally cause the opposite aileron deferential than you want (more down aileron than up). This is caused by the aileron wire connecter point having different movement in its arc than the aileron servo arm. To counteract this, I mounted the servo low in the wing and at an angle so the pin of the plastic connecter is at the hinge line and the push rods and aileron wires form a 90 degree angle from the connector pin, creating no differential. If I decide that the Kwik Fli needs aileron differential I will control that by the connection point of the push rods on the servo output wheel. Moving each rod back a little on the servo wheel and readjusting their length to re-center the ailerons creates positive differential.

The round hole in the wing in front of the servo is the pathway for the main retract gear air lines.

To be continued..