Finished (up)-drilling the skins. Removed the lower skins and deburred, then dimpled the skins. Removed the top skins, and the rear spar. Counter sunk all of the holes in the spars, and the reinforcements for the skins, and fuel tank. Dimpled the rear spar, reinstalled and riveted the spar stiffener to the spar, then riveted the rear spar to the ribs. Re-aligned the wing in the fixture in preparation of installation of the skins. Will deburr and dimple the top skins tomorrow and start final assembly.