Why not just replace the CA hinge with a covering type hinge? Much easier, and no cutting.

In case you're not familiar with the procedure, cut 6 pieces of covering about 1/2" x 1 1/2". match them up as 3 pairs of 2. Now, working with 1 of the pairs, turn 1 upside down, overlap about 1/4 inch and heat them together. Do this with all 3 pairs. Next, weave one through the gap and attach it to the bottom of the wing and the top of the aileron. Slide the next one through the gap right next to the first, but reverse this one so that it will be attached to the TOP of the wing, and the BOTTOM of the aileron. Then, attach the third one the same as the first.