I was going to use a CA hinge and cut a slot at the edge - keeping the bottom hinging. Since I'm recovering, I might add some wood to each aileron and then sand to a double bevel, and center hinge it. Haven't quite decided yet... You could also drill it out for Robart hinge points, and angle them into the wing and on the edge of the aileron.
Or just use a covering hinge, but 'looser' than Hangar 9 had it set up originally.