Had an issue with a rib not lining up with the wing skin holes. figure it out. (the rib had been riveted to the wrong attach angle first. drilled it out, riveted it onto the angle in the correct order and fixed the problem) Got the outboard and inboard wing skins clecoed in place. Fit the mid skin on, took it off to deburr and break the edges. Began riveting the inboard wing skin.