It was indeed a joke. With all the pieces neatly stacked up, it looks like a kit. I'm glad I did this fitting run first as there were a few little changes I needed to make along the way. I should get a lot done tomorrow actually screwing and gluing it.
I'm going to build a fake wall even with the edge of the tank on the french door side to seal that off from the room to protect it from moisture. I can't get behind there to kilz the tank wall after I'm done and I don't feel like painting boards beforehand. You'll see what I have in mind when I'm done.
I'm going to make a section that can be unscrewed easily to access the vinyl curtain covering the french door windows, so if I need to clean it or replace it that won't be a problem.