These are some of the components for the 18' long table I need to make for Zama.
I'm using 9mm MDF for the boards, with a 10mm thick laker of styrene to be stuck on top using No More Nails. Later, hexes will be inscribed into the styrene. I have another 30 or so sheets of the styrene down in the cellar. I'm designing it so that it can be used for either an 18'x4' table, or an 8'x8'.
The MDF was surprisingly heavy to carry 200 yards to my car, and when I measured it later at home, I discovered that the chap in the shop has cut it to the wrong size (604mm wide instead of 600mm; it doesn't fit the styrene), so I'm going to need to carry it back! Grrr. At least he didn't under cut it, I suppose.