Now that I am finally situated in one place for good (ie not threatened by a future military move), I can finally start installing the sub-assemblies that have been constructed but then set aside. I decided to return to the tail and start working my way forward.
My brother-in-law Tony Malley and his son (my nephew) Aaron came out to the Flugwerks to help. Tony is a Lockheed Martin F-35 production line manager, and hasn't actually pounded aircraft metal in a while, so he really seemed to enjoy the opportunity to make noise.
Tony helped me temp-mount the vertical stabilizer and the rudder, so that we could test-fit the rudder bottom cap. We carefully cut and sanded the cap's flanges so that it fit over the rudder/cable connection buckle and rested flush and straight against the skin's edge.