Hi Bob,
... it sounds like Paul’s latest work using Red River’s Polar Pearl Metallic paper is documented in 4000-Noritsu-5K-Plus.pdf, dated August 2013.
That was last year's approach. This year I'm (ironically) back to an approach that is more reminiscent of the 2200 era and "ABW." See http://www.paulroark.com/BW-Info/4000-Noritsu-2K.pdf . The reason is that with Claria/Noritsu (& now UltraChrome D6) the color dyes are stronger than the black dye, which is definitely not carbon.
From a cost perspective, however, the 2014 approach is a step backwards.
I'm not sure what printer you're using, but if you are using a 1400 or 1430, you can try the color + K ("Claria ABW") approach using the QTR profiles I've posted.
If you are using a 1400 you can also do what I did for a while -- just buy one cart of the Noritsu K and then use off the shelf Claria LM for the toning. With the Red River metallic, the K plus light LM toning is all you need.
Unfortunately, I know of no way to get the Noritsu carts for less. EBay has outdated ones for less than Noritsu/Epson's apparently price-fixed level.
For the best and cheapest B&W, use Eboni-6.
Paul