I have been giving my new layout due consideration, and with a 42" width and 108" length, with minimal scenery (no 400lb plaster of Paris landscaping) the table can be designed with relatively light weight construction like the work bench I designed and built for relocation as needed. It has supported me leaning on it for years, while pondering the mysteries of numerous HO contraptions. With a layout all it has to support are a few O27 trains running in circles.
The attached pic is of the workbench in question. The only added feature I am planning is to put a layer of 3/8" Homasote over the entire top surface and glue bond it with liquid nails to the 1/4" plywood top. The legs may be a little beefier 2"x2", thinking more along the lines of two 1"x3" in an "L" configuration, but still relatively light weight and movable.
the access holes are for wiring and attachment to each other. this is a corner piece with only 3 leg holes.
