Plywood Subroadbed

I took 48 feet of plywood and turned it into 80 feet of sub-roadbed. All of the straight sections along the walls, with the exception of staging are ready to have the supports added and the grades adjusted. It is now time for all those pieces of scrap that were in a pile in the floor to be put to use. That should give me more room to move.
I'm anticipating having to lower everything that has already been done so I can keep the proper spacing between levels. This is to also keep the upper level from being to high.