Richard
My feelings precisely. For me, the RYB alignment has always been as you listed. Just because modern printing technology has created CYM for its own purposes doesn't mean we need to import it into our qabalistic model.
It's too bad that RYB aren't the true primaries. For example, the best red, yellow, and blue pigments for things like fire and water are cadmium red, cadmium yellow, and ultramarine blue. You can make terrific fire colors with cadmium red and yellow, and ultramarine blue makes wonderful water. However, if you mix cadmium yellow and ultramarine blue, you get a greyish, dull olive green; and cadmium red and ultramarine blue mixtures are basically brown, not purple. There is nothing wrong with the basic colors. The problem is that the RYB theory is wrong. Someone even wrote a book entitled Blue and Yellow Don't Make Green (or something like that).