This is actually a very simple but time consuming section. You begin by constructing the bushings for the flap poles and then construction the seat positions out of piano hinges. This requires precise match drilling (use a punch here) and cleanup of the edges. Then I just primed all the parts and went to work. You begin by attaching a few nut plates to the forward edge and then a couple to the access hole in the back end and then get your squeezer ready for a seemingly endless session of blind rivets. Luckily they are all LP4-3 so they are no very difficult. You will once again need the wedge piece for the ones on the corners but it's something that at this point everyone is pretty used to doing. The final rivets in the aft bulk head are AN470-3-6 so you will need to get your rivet gun and bucking bar back there to finish this off. I ended up making once smiley face on the second to last rivet. Very annoying but it is barely noticeable (to anyone but me 😌). The last thing you do is add the flap motor mount which really strengthens the seat back bar (now you can sit on this and it doesn't even flinch) and then close the walls in the baggage area. I elected to just paint these with the gray SEM self-etching primer out of the rattle cans.