dedicating a 3800 for only carbon inks

any one here switched to all carbon inks for this printer?

if so, are you satisfied with the neutral shades?

I threw out the K3 ink and replaced it with Piezography Selenium K7/MPS, just to find out that IJC/OPM only supports 7 channels... (Crap) Will have to continue to use QTR.

But I am happy with the results, to me this is the only way to print digital BW.