Its a big lump of cast iron the table top dimensions are 6 feet x 3 feet i intend to use it in a landscape manner using 2 i beams extending over the 3 foot direction by about 18 inchs or so the idea being that it would make it an easier way to add a fourth axis. I've started drawing it up in sketchup after reading about sketchup on this forum. No doubt i'll have a lot of questions to ask and hopefully get answered later on.