I have just got my hands on a very nice Harrison M300 CNC with a very old hydenhine Control box . The box does not work but the guy who sold it to me got the machine to work using another box and it works very well . So I need to convert to mach3 ? Question 1 to all the experts , can I use the existing drive motors also can I use the drives . If not what size stepper / servo motors do I need . That's all for now until I strip things a bit and find more detail thanks.