So far I have no clues about how to import and/or apply a _gray/greyscale color profile to work with PDF/X-3.
But, in mylimited understanding, I've begun to work with a four-color text color set(including "Registration Black"), using "Monochromatic Light" (hopefully) as a gray. It looks a bit blue, but then some grays do. Am I cruzin' for a bruzin' here, or will my black text and "Monochromatic Light" (with grid-typegroup of marks changed to white) meet my publisher's "any grayscale profile requirements, as long as its PDF/X-3"? Or, do I need to start learning that I'm not learning what I need to learn? Barry
