QTR-Quadtone RIP

I have a R1800 I want to convert to black and white only. I saw the
option for UTBO at inksupply.com and it looks nice but to me it looks
like its just using 3 of the same black inks. Is this true?

Is there a option out there that you can buy that uses 7 or all 8
carts to get a really nice good black and white print? Maybe something
that uses Black, gray, light gray, dark gray, light light gray etc. I
know that Jon Cone makes a set but man its pricey (nothing against it,
I am sure its awesome!).

I have no need for color printing on this R1800 so I can use as many
of the carts needed, I just want really smooth black and whites.