If you have already ca'ed your hinges and have a gap the thickness of a "Quarter" then that will work fine on your trainer and sealing the gaps with any further covering film or tape will make no differance at all as well as make the airplane look patch work.

Yes that amount of gap will reduce the response of certain higher performance types but not on your trainer. I have flown so many of the fellows trainers with gaps far worse than that and in reality it will make no differance. This come under the catagory of things that the fellows will get so wrapped up in with their first airplanes, just like the plastic pushrods that they never actually get to the field. Its sorta of modifying your first airplane to death.

Mr67Stang's (mine was a 65) suggestion to use a pin and use that thickness is a good procedure and works well.

John