Do you still create icc's for the Canon Pro 10 using an X-Rite scanner? I had seen one of your YouTube videos explaining the printing process on my end, mailing them to you with 3 sheets of the same paper the color blocks were printed on, etc.
Is there a way to have you review a print image for a problem? I am using an old Epson 3800 printer which all of a sudden it is putting Black Ink marks along the border of the image and sometimes on the image. Weird.
I have done several head cleanings as well as alignment plus cleaning some of the internal parts.
https://www.printerknowledge.com/forums/canon-inkjet-printers.8/