I have a 1″ stainless setup with a 25″ x 49″ cutting area. No supports. I am however using aluminum for the the Z axis. I did buy stainless for these as well but it’s really difficult to drill the holes for the tool holder in stainless (read I’ve destroyed some bits trying). The corner posts are also aluminum. So only x and y are stainless. 3 ‘x’ pieces and 3 ‘y’ pieces that is. This is a new machine with only a few test cuts so far so I can’t tell you much about it’s performance at this point.