I have a 4880 and a T3270.
I have Accurip and will be updating to Black Pearl, my version won't run the T3270.
The 4880 is set up for all black and the T3270 has 5 cassettes, I have set up 4 for sublimation and 1 for black. It's fairly new, the UV blocking dye I use in 4880 is drying up in the T3270, Steve what Black are you using?
I don't know how much film you use but it's much cheaper using roll film, for pockets we print a 4" wide strip.
I'm using Epson's Photo Black, I don't want to void the warranty yet. In older printers, like our 4800, it was 1 black and 7 cleaning fluid, and the same with our 3800. It looks a little thin, but seems to burn fine, even the little 4% dots. It doesn't have to be perfectly solid black, it just needs to filter the light, 5K metal halide in our case.
Steve