Here's the tooling hole I was talking about yesterday. I'm gonna rely on the stiffener ring to seal up that hole, so I'll need to proseal between the rib and the stiffener ring.

I also made a couple cover plates to cover the forward tooling holes. Two rivets didn't seem like enough and four seemed like too many, so I ended up with these funky triangle covers. They look kinda cute, I think. :-)

Update: These are the wrong tooling holes...I had to flatten these dimples out. The covers were reused in the correct location.