Drilled elevator horn to root rib. Drilled long and short tip ribs to spar. Riveted short tip rib to spar, then riveted long tip rib to spar. Riveted tip ribs together. Riveted elevator horn to rib and spar. Drilled 615 trim tab reinforcement plate to skin. Deburred holes. Clecoed skeleton to skin. Bent root rib flange inward so skin lays flat. Drilled skin to rib. Bent tip rib flange inward. Clamped counterbalance skin to tip ribs and drilled together. Drilled skin to tip rib.
