Big day. Dave Harrison my main helper had a crisis at home and had to leave as soon as he came. Continued to work regardless. Final riveted the leading edge to the main spar. Prep'ed the outboard W-903 main skins, ribs and W-926 J stringers by deburring and dimpling. Refitted tank and set rivets that attach main skins to forward spar. EAA Tech Counselor came to help set rivets that I could not do alone.