Riveted 910 plates and nutplates onto the spar. Riveted 905 rib onto the spar. Flush heads forward. Riveted elevator control horn onto spar assembly. Drilled 3/8 inch hole for wires from elevator trim servo, so that they could have a seperate hole from the servo push rod. Better safe than sorry. Bought some snap bushings at Auto Zone and put them on the two holes.