Sandy's approach sounds really interesting, especially for the smaller droplet size printers, and would "fill in" the spaced created by the low ink limits. I've been using the Peizography digital negative ink set for the last few years so I don't mess too much with making digital negatives with QTR anymore.
I was reading about guten print and the programming that controls the firing of individual nozzles, but it is way above my head. I think it is written in C and involves too much computer math for me. I might force myself to learn it some day, but using the built is functions work great so I haven't found a reason for getting deeper into it.
Richard Boutwell