I'm wondering what you do with these extremely thin sheets of marble once you've cut them. They seem like they'd be too fragile to be good for much. I don't see why you'd need a CNC machine to cut this stuff, and using a circular sawblade and a trunnion table seems a really difficult way to go. Why not cut it on a tile saw or a diamond bandsaw, and save the CNC machine for aluminum cutting (which is an entirely different task)?