Peter Haas and I measured our King Way levels several months ago. The only parts we measured were the way rests, since everything else is pretty obvious.
I am steadily building pieces for a simplified version of this concept. Not as universal as the King Way, but provides depth mic checking to all upper surfaces anywhere along bed in reference to unworn factory surfaces.
It is mostly intended to fit a particular bed and provide very rapid progress checks in roughing down very worn beds with the Biax.
I will add to the dreary list, as SMT put it, of copyists of the King Way tool. I figure a person considering making one of these useful tools cannot have too many versions to look at prior to having at it.