It seems a little late to concern ourselves with the "line weight" of a rod, since apparently the line makers no longer conform to the AFTMA line weight standards anymore.
Also, we had charts like the Common Cents before the imposition of line weights (1962, IIRC). They were usually acknowledged, after a time, as of no value, because if it registered the rod as an HDH, the next question was "Which line maker's HDH?" So, we have come full circle, we test to find out a line weight, then we need to find a line maker that actually produces that line weight.
Why don't we simply cut out the interim "testing" and try the rod with a variety of lines? That way, the user gets a line that brings out the best qualities of the rod, at the distance the user will fish it, and with his unique casting style.