Sorry I guess I forgot to include in my lengthy response that the machine will retain the WCS offsets if you answer yes when prompted by Mach3 when you exit the program. I could turn the machine off overnight, home (align) it the next day and go right back to work on the same part.

The RF45 retrofit I had would repeat within an few ten thousandths of an inch when aligning it after being shutdown, and it just used inexpensive microswitches for homing. It was very impressive in that regard.

Joe