I'm looking at the charter oak cnc machine, and debating the purchase of the 4th axis rotab they have vs purchasing a stand alone lathe. I'm well aware that the rotab isn't designed to be a lathe replacement, but that it can be is intriguing. My main use for the mill and lathe is to make parts for motorcycles (and some cars), more functional parts than cosmetic doo-dads. I don't know that I would have a large use for a lathe, but I know there would be times when it would be nice. The trouble is, does "nice" justify the shop space for a machine that will sit covered most of the time, to say nothing of the cost. So, if the 4th axis is a viable small piece alternative, I could purchase it with the lathe money, save some actual dollars, and save a large footprint of space. How good a surface can the rotab produce? How difficult is it to set up and remove off the table, with the tailstock? Other than the size limitations of the workspace, what other functional limitations are there of the rotab vs a dedicated lathe?