I have an EU P900 and it has had color ink in it, I couldn’t find a way to trigger the initial fill to flush the inks. So, I have been trying to use the QTR flush images in calibration mode but the yellow seems very stubborn, and stains remain. The ink lines look like the color inks are gone but there must be some residuals around the print head that I can’t see. Should I use Piezo Flush on the yellow channel and keep printing flush images until I get pink and then keep repeating the process until the piezo ink replaces the pink? Or does someone know how to trigger the initial fill option on that printer? I also noticed that the QTR_Flush_images don’t necessarily align with the colors of the P900. I have been using the 10-ink purge file but was unsure if this file would miss certain cartridge lines. Thanks in advance.