I worked on the F-705 bulkhead today. The clamped the F-705B bar and F-705C doublers to the bottom bulkhead piece and the holes were match drilled.
Here’s a picture of the final-drilled parts.
I jumped to the F-711 bulkhead preparation. These parts attach to the F-711 bulkhead. This taper job on the stiffeners is optional for the tricycle gear fuselage.