David, do you have the composite Kangaroo or the kit. It sounds like the composite since I had the same problem. If it is the composite model you can slightly heat the leading edge of the aileron or the trailing edge of the wing and bend a little to create some clearance. I used a straight edge to push on the leading or trailing edge. This keeps it straight and the longer the better to push against more surface at a time. This way it does not get rippled looking.