I drilled the 9/16 inch hole for the fuel fitting that attaches the flop tube. I was careful to locate the hole so as to not get interference with the rivets, but I blew it. As you can see, the nuts barely touch the manufactured heads of the rivets that will evenutally be in place. So later I'll either round of the corners of the nuts or use flush rivets in the most forward location. Darn. I used the step down drill on the drill press. Then I match drilled it to the rib and reinforcement plate. I should have drilled all there at the same time. I did not get a perfect alignment of the hole, but it is good.
