On the Kitfox IV speedster, the flaperon skin is cut all the way around making a 1/4" gap at each hinge location. At these points the trailing edge is connected with a small metal tab. The 1/4 gap is covered with fabric. Was supposedly done this way to prevent flaperon binding during high g maneuvers. If I remember I'll post the directions for this from the builder manual. Bottom line is that a little cut in the flaperon skin isn't much to be worried about.