Continued tonight to reassemble the aft fusealge with clecos while checking the plans sheet measurments and squareness of the assembly. Before installing the mixer structure I went ahead and dimpled the holes to allow for flush rivets under where the mixer access plate will go.
I also countersunk the three rivets holes on each side of the LH & RH rudder stop plates. Finally I fitted the Y tail structure for the last time and riveted the tail post channel to the aft fusealge skin. Now I'll really pick up some steam with riveting the rest of the structure.