Thanks joeaverage,
Yeah, I figured that I did not want to change the "native" units on the machine. So If I load the gcode and the line reads "G20" I want to change it to "G21". After the cut is done, I will need to change the "G21" back to "G20". With this done, The cuts will run as drawn (metric). correct?
I'm guessing that the G20 and or G21 is originated via Mach3 and not through sheetcam where the code was created?
Thanks again!
rocaukum