I have not sealed the aileron hinge gaps on my Funtana. The gaps are 1/16" or less. I agree that planes with smaller ailerons and/or faster flying speeds could certainly benefit from sealing hinge gaps. However, one has to wonder if sealing the gaps on the Funtana would produce any measurable or noticeable effects. As far as aileron effectiveness goes, the Funtana certainly does not need more being that the ailerons are so massive. My Funtana rolls like a twist drill with 3D rates.

Ken Pavlou