Took bottom skin off frame to re-bend the leading edge. It did not match up to allow riveting after the initial 90 deg. bend. Bent both top and bottom leading edges slightly more and then re-clecoed the skins back on the frame. This allowed leading edges to match up for riveting. Riveted the bottom skin and leading edge. Cut bend tabs off tip skins and cleaned up. Riveted bulkhead rib to tip rib. Match drilled tip rib to elevator end ribs.