Still learning basic stuff. But had enough early success to keep going. Realized that I need to flatten my wasteboard slats. I downloaded Shapeoko Pro + 4 XXL Flattening File by KevinBarnett to use on my 4XXL. But when I try to run it Carbide Motion tells me
I find that opening the .c2d file up and drawing a box which matches the specified dimensions (draw up the cut in profile if need be) or moving the machine to the origin and then using a tape measure to measure out the dimension(s) in question will make clear where things aren’t lining up.