Yes a total combined X and Y size <48"
Where is the recommended build 30"x30", I want to update or delete that.
There is not really any recommended build size, for various reasons. Build it as small as possible for your intended use some people are using it for aluminum, some for 3d printing, some for 2d wood, ect. On the calculator pages I have a default size that easily fits the belts, but only because I can't start it blank.