Just installed MPS Dual Matt Piezo carts. Used OEM Epson chips from 3880 carts. All carts appear to print correctly except Y cart with shade 7 which prints pink. I printed out a 8 color flush chart too see this condition. Pulled the Y cart and made a smear with a q-tip which indicated the ink was indeed Shade 7. Yet when I print an image with 3880 Quad K7 there is a decidedly pinkish cast in the highlights which I believe is coming from the Y cart. Looking for an answer to clear up this problem.