Yesterday I squeezed all the perimeter rivets with a hand squeezer, then repositioned the firewall vertically by strapping a bungie cord to a 2x4 screwed vertically to a workbench. Shot the rest with rivet gun. Had a couple where the tails were goofed up due to juggling everything and 1 where I mistakenly used the wrong length rivet. Decided to call it a night.

This morning, I drilled out the goofs and reshot them.

I've read several builders logs where people have stated that the rivet callout in some areas was too short, but I didn't see that problem. What I did notice is that there are a few places where there are multiple layers stacked up, and particularly in the corners the stack up isn't constant. In all 4 corners there is 1 rivet that is a -7 where all the rest of them are -6's. I'd like to claim that's why a used a rivet that was too short in one hole, but the reality is that I was getting tired and just grabbed the wrong length.

In the photo, you can see what looks like scuffs on the F601 angle, but it's just where I put some tape on prior to riveting to protect the angle and when I peeled it off the next day a little primer came with it. Will touch up later.