One lesson I forgot to mention in earlier posts about the flaperons: I believe both the HomeBuiltHelp video and the photo assembly guide indicate that you should use A4 rivets to attach the full rib to the rib angle, and the rib angle to the spar. The drawings, however, show A5 rivets.

To be safe I went with A5.

The flaperons are now 3/4s done! All that’s left is the outboard half of the pilot side.