"Shapeoko 4 is usually a perfectly-crafted, characteristic-packed machine that gives large price for the money. The CNC router will work flawlessly with most tender components and metals like aluminum." The “pro” label signifies it is a bit more able. It includes an upgraded user interface and an offline controller too. https://bookmarkworm.com/story18637723/the-definitive-guide-to-used-cnc-tube-bending-machines