@oliof Thank you. Yeah for some reason I have
G31 X0 Y-21 Z0
I have not clicked on the links in your last post, but I believe G31 to be the offset of the z-probe.
When I first installed the Duet on my Makergear M2 I had to print a mount for the Probe and I did have the offset on the Y axis. My new print I have it on the X axis. Now, I understand, thank you very much.