Really the only good thing about the X1 is the price for the complete machine. Every part of it is full of compromises in order to meet a very low price point.
If you're going to all that trouble you might as well build from raw stock, as it's not like the castings are dirt-cheap. That way you can make the design really use the precision parts you put in. If you don't have the tools to do a scratch-build, I'm inclined to doubt you'll end up with a machine better than a Taig or Sherline, though it will probably cost more.