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Back-drilled the front spar to the tie downs and spacers. It’s easy to clamp the tie downs in place, but the spacers were wiley. They aren’t centered perfectly, but certainly close enough.
Then I drilled for the plate nuts, using one as a template. The first one turned out not very good. Then I figured out the best approach is to keep a bolt in the nut plate to make sure it stays centered while drilling. Clamp one side, drill the other (left picture), then put a cleco in the drilled hole and drill the other side (middle picture). The last step was to countersink for the nut plate attach rivets. Those parts are now ready to be primed. I’ll wait until I have a few more parts ready and do a big batch all at once.
I used the Scotch-brite wheel to make sure the fronts of the leading edge and tank ribs are nice and smooth. Reviewing the Orndorff video, they said that was important.
I also worked a little more on the wing stand. I fabricated and attached the cross arms. I figured out that where I have the posts is not going to work. One post is going to block a one inch strip of the wing. That will make it impossible to drill and rivet one side of the inboard most rib. I’ll move one post over a bit.
