Lookding for advice. Ive got this Rong Fu RF-40 knock off mill and a 6 inch rotary table that Im thinking about converting to a 4 axis CNC. Looks like, at a minimum, Ill need the following: 4 stepper or servo motors of various sizes. 4 stepper or servo motor drivers. Encoders if using servo motors. Motor couplers. Perhaps ball screws for X and Y precision. Motor power supply. Board power supply. Breakout board to drive the driver, process E-stop, interface to hand held pendent and interface to PC. Enclosure and various connectors PC w/Mach3 CNC software. Also used for software to tune stepper/servo motors. The other option to modifying the existing mill is pick up a mill like a Grizzly G0704 and start from scratch with a bit smaller mill that can be driven with smaller motors and cheaper drivers. Cost would probably come out the same. Planning on using Lazy CAD with Mach3 initially. Has anyone done this? Any words of wisdom or recommendations on which way to go?