If your servos have mounting lugs, you may want to remove them,
depending on how you plan to attach the servos inside the pockets.
Prepare the aileron control horns by re-drilling the hole with a
sharpened piece of the 1.5mm pushrod wire supplied with the kit. If
desired, you can use a smaller size wire for aileron pushrods (easier
to bend); 1.2mm wire is sufficiently strong for the job, but 1.5mm is
stiffer (stiffness helps to reduce your chances of aileron flutter).
Use masking tape, and mark the locations of the cuts for the aileron
pushrod exits and the control horns. The exit slots must be located
near the outside edge of the servo pockets. Measure the distance on
the bottom of the wings, then transfer the mark to the top. The
control horns must be slightly offset to the outside, to allow for the
pushrod wire bend radius.
Carefully cut the skin along the marked lines. The exit slots must be
about 20mm long.