I also thought I'd share how I made my Flaperon clamps. Because the spar is not on the centerline, I didn't figure it was possible to drill a hole that would allow me to accurately place the bolted 2x2's on the end of the flaperon to trace the contour. It would have to be oversized to allow the 2x2's to be placed, and then there wouldn't be a good way to hold the 2x2s in the right spot while I traced the contour.
So instead, I put a hole the diameter of the spar in a piece of cardboard, and traced the countour onto the cardboard to make a template that I then used to transfer the contour to the clamps: