I bought this unit for my homebuilt table.
https://step-motion.com/collections/pla ... kaway-35mm
I don't have a lot of hours on it yet but so far it's been fine. I'm a little surprised how noisy the ball screw is. Maybe I'm turning it too fast, ha. I have the smallest Clearpath servo available bolted on top and have my Z axis travel set to a max of 350 IPM. (I had it faster, but slowed it down.)
There were a few QA issues:
1. It came with a fried breakaway proximity sensor (smelled like it had let the smoke out, and certainly didn't work) but I was able to buy one just like it on ol' amazon for around $15.
2. The magnetic breakaway plate is held in position by 4 hex head screws and they fit the backplate loosely, allowing the torch to move a bit. To fix this I put small washers on each bolt, making them protrude a little farther. Problem solved.
I have a downdraft table so I have no concerns about water. I expect it to give me years of reliable service.