Secured LH tank in position to help hold everything in place while riveting top skins. Clecoed inboard and outboard top skins, as well as outboard bottom skin. Started by riveting the W-702 inboard top skin first, riveting the center rib of the inboard section, then outward towards the wing root (aft) and tip (fwd). Continued riveting the same way with each inboard and outboard rib subsecuentially. Lap joint (midwing) and inboard ribs left for later.