Construction started in the booth, so I would have a place to put things! The floor was raised about 2 feet. If you look under the saw you can see the floor joists. I had the basement built with 10 foot ceilings so I could raise the floor and still have adequate head room. In the center of the wall is the projection port and the projectionist's view port. Later the projection port had to be widened because of vignetting. The 6 plug ins are for the sound rack.