So! The printer has arrived, I (and 7 of my closest friends) got it setup and positioned, and it is marvelous. And gigantic. Somehow, even when you measure everything perfectly, it still just looks bigger when it's in your room.
Aside from some gripes about how damn slow it is to rename things (why??) in the Media Configuration Tool, and mild surprise at how much manual effort is required to feed cut sheets, I've been extremely pleased with what it's able to do.
I have had one interesting problem, though: some color-banding on a couple of third-party papers (see attached photo).
On the two Canon papers I've tried (A2 HW Coated HG, and A3+ Pro Luster), everything looks perfect. On the two third-party papers I've tried (letter Canson Photo HighGloss, and A3+ Ilford Gallerie Prestige Gold Cotton Textured), I see these banding lines parallel to the printer. The former has an ICC profile and AM1X file from the manufacturer, which I configured in the MCT; the latter, I used the built-in "Fine Art Cotton Textured" setting and the "Canon IJ 2015" profile.
Any thoughts on what could be going on here? Is the media configuration just bad? I've already done a nozzle check and the alignment printout looks solid to me.