I was able to finish up the riveting of the aft seat floors today. My forearms are sore from pulling all those LP4-3 blind rivets. Once this was done I pulled out the forward seat floors, removed the plastic and installed the nutplates for the stick boots. The forward seat floors were then clecoed to the fuselage.
Seat floors riveted to fuselage
Nutplates riveted to forward seat floors for stick boots