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ConeColor ink is so compatible with Epson Ultrachrome ink, that you will not need to flush out the Epson inks before installing ConeColor. You can actually change one ink position at a time on the large format printers so that you do not need to waste any of your current ink supplies. [B][I][U]On the 3800/3880 printers, an entire set of Refillable carts must be installed at one time[/U][/I][/B]. It is possible with desktop printers to install one position at a time. What customers of ConeColor will experience is similar printing performance to that of Epson inks.