Today, I finished marking the longerons for depth of countersinks for dimples in the fuselage skins. I also drilled the 5th "keeper" rivet hole (counting from the aft end) that I missed for some reason when originally drilling the longerons.
I then got out my dimple coupons, countersink cage, and a scrap of 0.125 aluminum and made a list of countersink adjustments for each combination of metal thickness and die type. That list can be found in the "Tools" section of my log on this date.
A sample of the photos documenting the countersink depths in the longerons.