Hi, Mike Johnson here from Northern Illinois. I built my own CNC from scratch, then purchased a kit from CNC routerparts for a larger more robust cnc. My computer recently crashed so I am currently installing necessary software again. I need help with which version of Mach to install. I purchased a license for Mach 3 several years ago, and now notice there is a Mach 4 hobby version. Would there be any advantage to switching or continue to use Mach 3? Sorry, probably not the place in this forum to ask this question, but I'm at least looking for a thread that would discuss this. Thanks, and this site has a wealth of info. Mike