The fuselage tapers down greatly to the very aft end where the horizontal stabilizer if attached. It order to hold the stabilizer in position rigidly, we laid up fiberglass angles to which we attached a rather thick aluminum plate which we trimmed to fit. Then we drilled a dozen holes for AN3 bolts. On the four fiberglass angles, we mounted 12 nutplates for the bolts. This torque plate greatly stiffens the fuselage so it resists the loads on the elevator.