Gents,
This table in my shop is 4 ft x 8 ft and fabricated out of 5/8 steel plate. Photo attached. There are Qty 6, 2 inch sockets located on the perimeter (reese hitch dimension). The sockets will accomodate all manner of attachments, bridges for hold downs, upright stantions for a post vise or a swage holder. Versitality is what you are looking to achieve. Do not skimp on the legs, heavier the better. Make certain to edge frame with some HD rectangular tubing, this will stiffent the flat surface and prevent any deflection. Note that moving these type tables is a task. Approximate weight, less any attachements, is close to 900 LBS. It is a tremendous work surface.