Match drilled bolt holes. Enlarged system holes and installed snap bushings in all wing ribs. Drilled #30 hole in each rib for supporting wing conduit. Spot primed each rib. Installed bolts as per drawing, torqued to 25 in-lb, and applied torque seal on each nut. Riveted each wing rib to main spar. Installed Van's wing conduit through second forward lightening hole.