Those are the settings for my Boxford 260 VMC. They should get you up and running.
Ball screws and stepper motors are standard. As to your other questions, I'll dig through my archives for the information....I have of course no memory left after the Denford Easiturn3 conversion, which I finished yesterday. (Don't mention that though, because I've spotted a job list drawn up by the Domestic Engineer.) If you want the other Mach3 settings I use, just shout.
Regards,
John.