No pix today. At some point, they begin to look the same. So this evening I sanded the extensions to provide a flat surface for bonding between the spar and the skin. Next came sanding off the micro from the spar that I had laid down earlier, so that the added material on the upper skin would meet appropriately. After that, I placed some clay on the spar, and test fitted the upper skin to the lower, and by golly the fit was pretty good. Tomorrow, time permitting, I'll do another micro fitting of the upper and lower skins.