Drilled the Firewall, Exhaust Tunnel and Station B Bulkhead for future installation of nutplates.
Since I had everything fit like I wanted. I went on to match drill all of the holes in these pieces to establish the placement of the nutplates. I'll use #8 machine screws here (AN526 SS Trusshead), with MK1000 miniature nutplates (MS21069-08) - like everywhere else so far.