If you decide to go with this brand, be sure to get the “EZ-VIEW” model. There are still a lot of their previous models available and they’re not nearly as functional and have much less capabilities. These really did change my world as far as milling and using the machine. It was on eBay and the sellers handle is taylortoolworksllc . If I remember correctly, I bought a 6” for Z (the quill) a 24” for X and a 12” for Y. As I said in another reply – you can cut the scales to any length you want. I welded up a “very” sturdy mount that had some rotation for perfect viewing. SOURCE: Home Machine Shop Facebook Page, 5-23-18.