Rear spar drilled
First order of business was to re-evaluate the wing sweep and incidence from last night. I ended up using a good ol’ fashioned analog level. I think they are actually more accurate than the digital level for surface very close to level. The digital level tends to read 0.1 in either direction kind of randomly. I tweaked the incidence on the right wing a tiny bit and then was happy. After double, triple, quadruple checking everything it was time for drilling. After dinner.
After a quick bite to eat, I drilled the rear spars. I used a thick block of aluminum that I drilled on the drill press to make sure I was drilling at a right angle. I used the marks from last night to make sure I had the required 5/8″ edge distance. I started with #30, then 1/4″, then another drill that was slightly larger, and then 19/64″, and finally a 5/16″ reamer that I borrowed from Jim. The reamer was just like butter and made a nice tight fit for the AN5 bolt.
I still had some time left in the evening, so I drilled all of the holes in the bottom flange for the #8 screws.