nche11,
I'm the person that used the -18 and -15 with the Hobbicolors ink. Colors are visually okay with OEM, Inktec, and IS inks after switching back. I hate to tell you this, but it is not the printer. Printed photos with uncorrected Hobbicolors were overly saturated and unacceptable without correction. This was with Kirkland, Kodak, and Ilford papers. I don't think that I am alone with this opinion but to each his own. I don't know if my batch of Hobbicolors ink was from the same as yours or if there were any changes that Hobbicolors made in their colors over time. I have not purchased more of their inks to see if colors were the same as I am satisfied with IS inks.
I'm the person that used the -18 and -15 with the Hobbicolors ink. Colors are visually okay with OEM, Inktec, and IS inks after switching back. I hate to tell you this, but it is not the printer. Printed photos with uncorrected Hobbicolors were overly saturated and unacceptable without correction. This was with Kirkland, Kodak, and Ilford papers. I don't think that I am alone with this opinion but to each his own. I don't know if my batch of Hobbicolors ink was from the same as yours or if there were any changes that Hobbicolors made in their colors over time. I have not purchased more of their inks to see if colors were the same as I am satisfied with IS inks.