Today I put the floor back in and drilled and tapped for holes for 1/4-20 brass flat head screws to hold the floor to the steel tubing.I also used Loctite glue. total weight here is 467.1 lbs
Also today I added Alder wood where I need it for attaching the 1/4" Baltic beach plywood walls and I refitted the inside walls before removing them again to give them there final coat of poly.