Just added support to Gutenprint for the Kodak 605 and 805 dyesub printers. They were mostly the same as the 6800 and 1400 (respectively) they replaced.
I've also reverse-engineered the raw dump formats of the Mitsubishi CP3020D and the CP3020DA 8x10 dyesub printers. They use a somewhat convoluted block-oriented format, with the former using CMY-based plane interleaving and the latter using RGB-based scanline interleaving. To add joy to the mix, the blocks are sent to the printer in reverse order (bottom-up), but within each block the scanlines are top-down.
Once the Kodak 1400/805/6800/6850/605 support is reviewed and committed into Gutenprint, I'll start working on the low-level changes necessary to support these Mitsubishi printers.
Maybe a grateful user will mail one of them to me in thanks? (hint hint)