Started riveting the skin. Set center forward rib. AN3-3.5 seem too short. The dimpling also seems overdone - distorting the skin to make the hole larger. I have had to use some scrap metal to make grab washers for the clecos. Got the top of the center forward rib riveted. Having trouble clamping the lower side to the skin, so I quit for the night. Buy some washers tomorrow.
