Digital BW, The Print

>...I use MIS Eboni ink in the black position and
> cleaning carts in the other five. ...

I suspect putting Carbon-6 -- http://www.paulroark.com/BW-Info/Ink-
Mixing.pdf -- in those 5 spots would be as effective, cheaper if you're 
not making your own cleaning solution, and a lot more fun.  I don't 
believe I've ever had a clog with these dilute inks, no matter how long 
they've sat un-used.

Paul
www.PaulRoark.com