Rivet the aft two ribs to the F-779 bottom skin. It was a bit of a pain, as the dimpler did not do a fantastic job on the 40 mil skin; the rivets seem to set it a touch low. That, plus awkward access to the flanged made for a slow job and multiple drilled-out rivets.
Clecoed the unit onto the rest of the fuse and starting to prep for riveting the rest of the cone.