I am going to look at a for sale Bridgeport Series II mill that was retrofitted with MACH3 today.  If anyone could chime in on things to look for that would show a system is setup well/correctly I would greatly appreciate it.  Does there exist a log file I could quickly view to get statistics on machine history?  Thanks!

My concern would not be how well Mach is set up as that can be easily and quickly   changed if it is not.
What I would be looking at is how well the retrofit has been carried out, what components have been used and is there any wiring diagrams of the the retrofit so I could troubleshoot in future.

Hood