Change of ink from dye sub to pigment

Epson 4800 that may have been used with dye sub ink. I would of course flush the system with PZ but what else should I be concerned about. I had read about a firmware update needed that involved a 7600 changing from sub ink to pigment. does anyone have some information to share.

You should be ok just to convert directly. After the 9600 all firmware was built for pigment.