I measured the horizontal to be about 1.1 to 1.2 and the vertical distance to be about the same 1.0 to 1.1. I saw an image that lists issues with these measurements, but none of them seem to match both of these values.
Since I just changed the cyan roll - I have printouts before and after the cyan cartridge, my powers of deduction tell me - it's the cyan cartrodge, but am looking for other feedback.