Quote Originally Posted by JAZZCNC View Post
Large double gantry machine for cutting and polishing granite and marble slabs. The two Gantry's will be mounted on linear rails which are basically fixed on top of a high wall on adjustable stainless steel plates. Accuracy to the Micron level isn't required but still needs to be reasonably good for the polishing.
Sounds like a proper installation!

I can only suggest you pick up a laser and try it, or even just borrow a rotary laser from a local builder or window fitter.