i am flying those horns socket head servo screws that microfasters sells. they are holding up great the servo screw is like a sheet metal screw that is about 5/8 to 3/4 inch long. once u harder the wood with ca it quite a stong hold just dont scrip the screw hold out by over tighten. This set up is on a DP EXtra running a Brison 3.2 22 x 8 menz 3-8411 2-5625 hitec....