Dimpled the left and right HS Skins and Countersunk two of the Spars. My brother Joe came by to help with the construction. It was a huge help to have an extra set of hands holding the Skins in the dimpler. The dimpler could not reach all the holes in the Ribs. I am going to have to use another method to reach these holes. The pop rivet dimpler seems the best choice for this task. I will need to locate or purchase a set. The countersinking went a little slower than expected as the "micro-stop" gave us a little trouble.