Completed riveting both ailerons. This included a lot of drilling, clecoing, deburring, cleaning, reassembling, re-clecoing and riveting. The results are strong and light. The light in the photo amplifies the fact the skin is dimpled where the ribs are riveted. For future reference, I would have, just to be sure measured and adjusted the bend angle of the ribs with a sheet metal tool and a square.