Pulled all required wing ribs from inventory for left wing. Fluting pliers used to flatten ribs as much as possible. Drilled aileron and flap hinges to accept flange bushings, used drill press. Cut out attach angle for root rib from parts assembly and clecoed, checking for fit. Drilled and riveted all hinges to proper ribs, also attaching rib aft attach angles to those ribs with a hinge on them.