Had a very productive day today. I counter sunk the holes for the fuel tank nutplate screws on both spars, testing each countersink individually, some needed to go down a bit more which I did. I also did the drilling, countersinking and riveting of the inspection panel nutplates on both spars as well as the 1000-4 nutplates for the upright attach at the inner end of the spars. Then I primed over the work. All in all a good days work.