In my new shop I will finally have room for an assembly/work table and had planned to make it 4' x 8' on locking swivel casters with a 12" vise in the center of one long and one short side with a Record 52 1/2d vise in the center of the other 4' side. There will also be a power strip on the remaining 8' side. Not sure what to make the top out of though and am debating between a torsion box with t-tracks or mdf with uniformly space holes or something heavier. I am going to incorporate a downdraft table into the outfeed table (3'x 8') for my table saw. Comments and suggestions are always welcome and appreciated. Thanks