the big thing too be sure of is that when you have the aieleronon that you are not able to make the aieleron move up or down while keeping the aileron in a consistent attitude (move up and down like an elevator in a building). if it does not move up and down vertically you can seal the gap with some covering or clear tape. This is a hack way of fixing the problem that works but the other methods listed above are better especially if you are flying more performance aircraft in which this method would be very costly to try.