After some constructive suggestions, I made few mods and additions, so you can get the upgraded version from http://www.novalab.org/mach3/index.htm .
I am also posting details of my insulated QCT.
The link is dead. I'm looking to change from AH-HA to Mach3 lathe. So I'm trying to find all the Mach3 lathe resources that I can. Let me know if these are still usefull or if the supplied screens are the best option.
I think this might be the link? http://cnc.novalab.org/mach_files.htm