I fitted and drilled the aft mount assemblies and aft shear web tonight. I now only have two more brackets to fit and drill in the aft section of the fuselage. the fwd bracket that attaches to the few underneath side of the shear web and the aft angle bracket that attaches to the fwd tail wheel post assembly.
Once I finish pilot drilling those parts I'll remove the aft Y structure and grind the service bulletin doubler, tirm for rivet clearance, reinstall and then updrill all the of parts on the aft fuselage.
