Guys there was a guest at our club that has all of his hinge gaps sealed on all his airplanes. It looks really nice and he swears it changes the flight a lot for the better.

I was thinking about trying this but have no idea how to seal a gap without restricting movement of the aileron. It seems if you stuck mono or ultra over the gap and heated, it would shrink and tighten and limit movement. If you left it loose and sealed the edges would it not eventually make an ugly little wrinkle ?

I have only built one kit, I tried mono and it ultimately defeated me..........the second attempt (with ultra this time) went ok but had to many wrinkles to keep me happy, the third time was a charmer. I am really happy with the ultra on my Tiger II .40 ...errr now.
My GP Cherokee and Big Stik are mono arf, and the rest of my planes are all ultra .. Baa I am rambling, I do that more the older I get, anyway how do you seal hinge gaps properly ?