Brian, that Inkjetmall page is another excellent resource -- bookmarked!
Unfortunately, even under a powerful loupe it all looks great. Verticals are nice and straight. Horizontal lines are evenly and properly spaced. The only problem evident on this nozzle check is those 3 missing LM nozzles. It looks just like the nozzle check for my known good 1430.
Is it possible that the LM channel, with its missing 3 nozzles, is affecting all the other ones? Even on a print made with QTR
and 8ink file in Calibration mode (which I thought was designed to isolate the channels from each other)?