I finished up the Spar and stringer countersinking work tonight, everything went quite well. The only issue I had was when I tried to use the drill press for the stringers. After a lot of setup time, and lots of clamping, the piece moved slightly and I ended up with a lopsided hole. I switched back to using the drill after that mistake, as it’s easier to feel what’s happening and stop or adjust if needed. The enlarged hole will need to be drilled out to fit a larger rivet, which shouldn’t be a problem. Given that I countersunk over 400 holes, I’m ok with one error.
Then I riveted the inboard inspar ribs to the stringer web, and clecoed the stringers to the stringer web. I decided to stop there, as it’s getting late.
