I went on to work on the wing pin. I had to re-drill the hole because it had filled with epoxy when I glued the plywood piece to F2.

It ended up not quite where it needed to be, unfortunately.

In the first picture, I'm refilling the hole with epoxy and shims to keep the pin snug. In the second picture, I'm gluing the pin into the wing.

I'll let this dry overnight, and then I can re-measure everything and drill the rear wing bolt holes.