This is being shared for those who have followed GunrunnerJohn and Tom Tee as they build John's layout.
My layout is completely different in design, and a good contrast in building technique for those who have not built a structure before or are looking for an alternate way to build. I used a modular approach and tied the 3'x5', 3'x4' and 2'x4' together in making an "E" table layout in a 13x20 space which worked for my desires.
If there is anything in what you see that you would like to use, by all means. I am sharing this for ideas and showing how it evolved, if you look at the pics closely, you will see subtle changes I made on the fly from what was originally laid out, I used RR Track v5 to massage the overall layout for the space available.
I used OSB underlayment to lay a floor under the entire layout so it was not resting on the carpet, which is left in place should a move need to happen. The table modules are screwed together and easily removed with a power drill once the track has been separated.
I built this in 4 months starting in May of 2015 and had the basic layout in place in September, and slowly added and tweaked the systems since as I found a better way to use the space or changing how I used it.
Enjoy.