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Reamed out and shortened the bushings for the control columns. I test fit everything, but I didn’t spend too much time on it. The instructions say you can remove the control column assembly in one piece, but it really can’t be done. The passenger side column was a little stiff on the bushing, so I reamed it out a bit with a large drill bit.
After that I worked on countersinking all of the nut plate attach rivets on the top flange of the center section spars. I riveted on the nut plates. (10/10/2005 Edit: If you’re building a 7A, leave off the outside two nut plates on each side on the front flange. It will make fitting of the gear mounts easier.)
I prepared the cover support ribs, drilling them to the spar. Fabricated the web stiffeners and drilled them to the spar. Fabricated the spacers and drilled out the holes in the spar to 1/4″ in 1/64″ increments.
I finally got to use my new nut plate jig on the web stiffeners. It works fantastic. I gave Adele the camera, and she went crazy with it while I was working on the stiffeners.
Lots and lots of drilling today. I’m glad I have a light air drill.