Countersinking and dimpling seat and floor ribs - 3 hours

I need to drill the crotch strap brackets for nut plates.  Using the same process from yesterday, these go fairly quickly. I then set up the countersink tool and countersunk the rivet holes for NAS/Opps rivets.

I then countersunk all the other rivet holes in the ribs for the nutplates. Once that was done, I could then dimple the #8 screws in the baggage ribs. (Note that the most forward #19 hole in the rib is not dimpled as that is the hole that meets the F-705A bulkhead and I decided not to dimple those holes).

Side note. I had to grind down the edge of my #8 screw female die so that it would fit in the flange. I better order a new one