Fitted and drilled reinforcement plates to spar. Clecoed both forward and aft spars to skin. Bent root rib flanges to match spars. Clamped, drilled and clecoed root rib to spar. Initially installed a shim between rib and spar, but after dimpling spar, this became unnecessary. Dimpled spars. This was a mistake (See 5/29/2002). Cut and filed notches in tip rib flanges. Clamped, drilled and clecoed tip rib assembly to spar. Positioned E-615 trim servo reinforcement plate. Drilled out, deburred and dimpled all holes. Polished edges of plate and cover plate.