I have 4-5 of them in the other house next door. Two of them are the same size but I'm wondering how good of a layout they would make if they were stripped down and 1/2" plywood screwed down to them. I was even thinking that sense box springs are deep that the top could be used as a layout and the under bottom side used as rolling stock and locomotive storage. What do you guy's think of this idea? I do believe they are singles.