Gutenprint - Top Quality Printer Drivers

Is it all possible to develop a driver for Sony DPP-FP75?

I am aware that there are 3 other requests for other printers in DDP-FP
series, all closed mentioning "different protocol" that "can't be supported
unless somebody will donate the hardware."
Not sure if FP75 also uses "different protocol" and if developer's access
to h/w is required to develop the driver.

I can offer help with any testing that is required, arranging access to h/w
is also possible (I am currently in Moscow. Russia).

Sony DPP-FP70 - ID: 2699689
Sony DPP-FP55 - ID: 1744521 ID: 1540277