Time to get the empennage fairing fitting better. More clear heavy duty packing tape over the tail pieces, then waxed up. I mixed up some epoxy and brushed that on all of the interfacing surfaces, then mixed up some cabosil/flox mix and used a plastic knife to spread it over the epoxy. The hard part was getting this fairing on without smearing the epoxy over everything. Some painter's tape just to hold it flush to the aluminum.