Placed, piloted, and eventually updrilled to #30's the left lower wing skin
I have decided that using two plumb bobs is a much better way to level (prevent twist) than the bent piano wire technique. You do not have to consider any interference from the ribs or worry about bends in the wire. Go with the plumb bob!
Also drilled the hole for the tie down attach fitting. Began the process to add nut plates under the aileron bellcrank inspection hole. Drilled the lower attach angle for the bellcrank assembly; wish I had made these with greater care as my holes are not in perfect alignment -small cosmetic detail.
