quote “Do to space limitations, I have 18” HO curves, and have to use Atlas snap switches".
No you don’t. It’s just an excuse !
A 4’X8’ layout takes up a whole room, because you have to walk around it. With only 3’ of ‘aisle’, it occupies 10’x16 of floor space, and room enough for only two people to sqeeze by each other. Spare bedrooms are 10X10 or 10X12.
You’re a sole operator and no onlookers? OK, a doorway is 2.5’ so your layout occupies 9’x13’ and addicted to a 4x8 plywood board you cannot reach across.
WHY? A 3/4" plywood board can be found at any lumber store, and can be supprted by saw-horses or 4 legs, in its simplest form, and beats an oval around a Xmas tree.
In most midwest homes it is relegated to the basement - along with other unwanted storage items. A man’s home is his Castle, right? (mostly in the basement).
Tear down? Forget it! Now one can ‘play’ year around - except when the lawn needs mowing.
Penalties of a 4X8: All trackage has to fit the board. All curves have to 22"r or less. Equipment puchases have limitations + modern RR equipment you see and want doesn’t fit.
My first layout had 18" radius curves, but the rolling stock available was mostly 40’ - 50’ cars. Subseqently, I went to 36", then 46"-48". Now I use the room corners and can go 34" to 46" easily.