QTR-Quadtone RIP

I am going to buy the Epson R3000 that will be used for my B&W artwork.
I would love to work with Carbon inks in several shades to achieve a very smooth result.
I have investigated several options for an alternative ink system based on the so-called 'Piezography' workflow, in where all color inks will be replaced for blacks in several shades. I know about John Cone's Piezography inks, but this is a pretty expensive investment. Besides that, I live in Europe and thanks for the links section here I found a great alternative; http://shop.farbenwerk.com/schwarzweiss-tinten/carbonprint-museum
-This is a German site who sells pure Carbon inks up to 8 shades. While for the Cone inks you will need a RIP like Quad Tone, this site suggest a different workflow (http://shop.farbenwerk.com/...69/schwarz-weiss-drucken-mit-carbonprint-museum).
-It boils down to keeping the image file in RGB (AdobeRGB1998), while making it B&W with a layer channel, but keeping it in RGB. Then just use the print command and so on.
I don't really understand this workflow, will all the shades of grey be used in this approach, just like it would with Quad Tone RIP? 
Another approach will be working with Quad Tone RIP. But I don't have a profile to load into QTR, like the pre-made files QTR has for Cone inks. And even if I would use Cone inks QTR does not have an Epson R3000 profile as far as I can see.. (Only for K3).
Can I still work with QTR in combi with these Carbon German inks or do I need profiling equipment to make QTR work with this ink?
Thank you for your time, I hope someone can help me out, I am new to this.