During the last few days I did some fluting and deburring on the F-709, -710 and -712 bulkheads, then fabricated and match-drilled the angle that’s attached to the F-710 bulkhead.

I also started fabricating the horizontal stabilizer attach bars for the F-711 bulkhead. These bars are made from 2024-T4 stock, and the rivet holes that attach them to the F-711 bulkhead halves are match-drilled through pre-punched holes in the bulkhead halves. Turns out that hand-drilling those holes isn’t such a good idea, as the bar stock is a lot harder than the bulkhead material and it’s easy for the drill bit to wander – and that’s what happened. I wasn’t completely happy with the way these parts were turning out, so I ordered new ones. Sorry, no pictures – there will be plenty when I fabricate the replacement bulkhead.