Match drilled the F-695 Gussets. I also had to trim the fwd edge a little bit to get it to match the angle of the firewall better and increase teh angle of the bend to get it to lay flat. I was super careful to lay these out because of edge distance concerns on multiple layers. The 10 fwd holes along the long edge pick up the steel engine mount bracket as well, and on the right side I actually was almost too conservative with this. The 11th rivet back was so close to the aft end of the steel bracket that it was going to be difficult to get a good shop head. Since I had edge distance to spare in that direction, I slipped a steel putty knife behind the bracket to protect the longeron and carved out a relief for the rivet tail with a rotary file on a dotco. went slow and checked several times to make sure it was going according to plan. Turned out fine. I adjusted teh layout on teh other side so that this wasn't an issue. Match drilled and riveted. Most could be squeezed, but the fwd couple on the long leg needed to be shot. These are AN470AD4-7 rivets, so they take more grunt to set than my favorite tungsten bucking bar could handle, so I went into the drawer 'o bars and came up with a honking big steel bar that weighs a couple of pounds and set them nicely.