I skipped ahead a little, as I’m waiting on a drill block to help with some of the drilling where alignment is critical. I worked on the F-01410 bulkhead; deburred, stepped-drilled a systems hole, fluted and dimpled the F-01410 bulkhead. Then I straightened and final drilled the 1/4 in holes in the F-01410C, then clecoed it ready for final drilling.
Then I clecoed the F-01411 Bulkhead ready for final drilling.
These two bulkheads will hold the horizontal stabilizer onto the fuselage, so there is a lot of reinforcing here.