Completed fabrication and riveting of closeout panel stiffeners.

I was short a stiffener for the second floor panel, so I used a J-stiffener left over from RV & Rocket builds.

I don't like the recommendation of using #6 screws along the bottom, self tapping into the floor. Since I haven't riveted the bottom skin in place yet, I will add some A6195-6Z-1D tinnerman nut plates to provide a more secure attachment.