Fabricated the L-angle stiffener that goes on top of the main upper structure. Clamped in place and pilot-drilled to #40, then up-drilled in two steps to #20.
Removed the parts and deburred the drilled holes.
Checked the main assy for other #40 pilot holes that needed to be up-sized and drilled those.
Disassembled and deburred the other parts just drilled and partially re-cleco'd. There are some parts that remain un-cleco'd right now in order to get rivets under the final parts.