This impressed me quite a bit. I printed a second nozzle check after cleaning two ink channels. As I often do, I reused the same sheet I'd used minutes earlier to print the very nozzle check that dictated the need to the cleaning. What I failed to do was reorient the sheet; as a result the 2nd nozzle pattern was printed "overtop" of the first pattern - same sheet of paper, same side, same place on the page. Amazed by the precision of the overlap, I printed a 3rd pattern on top of the first two patterns, just for fun. This is crappy, flimsy photocopy paper, fed from the 4900 cassette tray. The registration of the patterns speaks to a level of paper handling precision that I'd have never predicted. This is the result:
Cheers,
John-