Still haven't determined the optimal media setting for the 3880 without a rip. Have not received a reply from epson either. The sample I printed looked pretty good, but I recognize that k3 inks don't block uv as well as the dye based inks. So I downloaded the Accurip trial to get a comparison. Wow! Using the droplet weight test page and varying my resolution I was able to get a really nice black on film with a max droplet size and the 8 pass 1440 x 720 resolution.
I want to keep the printer set up for color printing since it isn't a dedicated machine. Never really thought about how the inks might print differently than my 3000. Will try some exposure tests with both films to see how much ink I really need to lay down on the film, but it looks like I do need more control over the 3880 ink deposit. I don't print many halftoned images, but the easier workflow seperating to postscript along with the better ink deposit on the film through Accurip make the 3880 the printer I need. Dang, There goes another $500.