Hi G, there's only one slight problem if I built this...where the heck would I put it, going to be tight on space in my little shed as it is!! The design as it is allows maximum travel of the bed so I can cut the whole area (500 x 400) I've got the raised sides (sealed with gaskets/sealant) so I can flood the bed with water when cutting the CF so the dust doesn't go everywhere. TBH I doubt I'd need any of the diagonals for cutting CF and Trafolite but I've got the steel so better safe than sorry!! This could use up all the left over bits I've got from when I bought the rubbish TB6560 control board and steppers, might even be able to use it for engraving labels for work. Spec for this one is very much as per my first post on here with the exception of SBR12 rails and blocks.