The order that you rivet the fwd upper tailcone skin to the substructure is critical. There is a rivet at the aft centerline that has to be shot before you install the rib, otherwise theres no way to buck it. It's so tight in there that I don't really see a way to even get a blind rivet in there if you do it in the wrong order. I shot about 6 or so rivets along the skin seam, then installed the rib.
All went well except I goofed up one of the -4 rivets that are common to the F-707 clip and the fuselage frame. I tried to squeeze it and clenched the tail. Of course, the second rivet was worse, so I cried uncle before I made it worse and installed a cherry in that location. I shot the other one and it went fine.