I can't ever seem to be happy with my machines-I always need to take them to the extreme. Well I have decided I need a 1500mm wide machine so I can cut cabinet fronts and panels out for making more storage in my shop. I have found one source for a 1500mm 1616 ball screw, and I ordered it up-but it seems to be stuck in customs (from Canada eh). I actually purchased from their ebay store, since the exchange rate made it cost less than ordering from their web store. https://snbinc.ca/store/ On a side note, these guys have acme tr8 stainless steel in 1500mm lengths, but I think the whip on that would be pretty bad. I'm really not sure that a 1616 screw is going to fit well on a c-beam gantry, will most likely have to cut new plates for it. I don't recall any c-beam builds running a lead screw, someone correct me if I'm wrong. Has anyone found a source located in the U.S.? What I'm really looking for is a 12mm acme style, as I have a few builds going that could use a standard style lead screw.