Thi is my first post Machinist for 30 years Cnc for 15. I found a Newing hall NH600 engraver that is in great shape but has no control. I would like to convert it to a router by adding a Z axis. The mechanics are no problem. I don't know anything about steppers and PC controls. My question is are these steppers and control any good http://cgi.ebay.com/4-AXIS-CNC-Route...item414e12805e This way I won't have any compatibility issues. Thanks for any feed back