If you had not called out the file, I'd have never known. I'll give it a go later on. One set of changes at a time. I had already compiled and uploaded ROBOR1PlusV2 after applying the edits I could find/recall for my machine and it did not object, so far. One thing I notice now is that the Z position after a "home ALL" from MC displayed on the LCD seems to reflect what is sent via the M565 commands.However, After a power off and on of the printer, the LCD now shows Z +0.000. But it appears that an M565 command will affect the next home all and is persistent at least for that power on session. It appears, pending further testing, that M565 is applied BEFORE the "Z-offset" (MC) is applied. if it us applied at all, it seems it would be when the slicer does it's magic. I'm off to look at Gcode to attempt to create a simple sequence to test that thought. It will have to be VERY simple, given my current frame of mind.