Thanks for all the advice. Sounds like my options are to sand/shave the existing leading edge of the aileron to bevel in the middle for the hinge per plans, or to add material and could do either a top hinge or traditional middle hinge. (for middle hinge I might use the CA hinges, for top hinge I could use the Dubro pinned hinges as mentioned in the post above or Robart pin hinges) My concern with beveling the existing aileron leading edge is that my existing leading edge is only 3/16" thick, and I might need to remove at least 1/8 inch to get the 1 inch aileron deflection recommended in the plans. This would leave me with little wood for the aileron leading edge. Below is a picture where I have shimmed up the aileron with a little piece of 1/4" stock and moving the aileron on this gives me about 1 and 1/8 inch of deflection. If I add material, it makes the aileron too long and stick out past the trailing edge of the wing, but I could just trim the aileron. Would I add less material with a center bevel vs. a top bevel? Any other input? Thanks to all.