If you like the old timey look, this is easy to do. Glue spruce sticks (1/16" thick by whatever you need to match thickness of your surface) to the edges of the stab and elevator to be hinged, sand them to a smooth half round. Punch starter holes with a pin every .25" then sew with dacron thread. I call it a figure 8 stitch, same as on a baseball, only 1 thread instead of two. Pretty much closes the gap and nearly zero friction..