It came with a bunch of end mills and the milling attachment. With those accessories it makes the lathe into a 3 axis milling machine. The cutting bit goes into the spinning collet. The cutter is stationary, and the part is moved with an X, Y, and Z axis steppers (up-down, left-right, and in-out). I don’t need or want 4th axis. That’s why I was wondering if the X-Controller would be able to work.