I have printed quite a few prints almost or at 3 metres on Mac BUT I had to reduce file size to 150 ppi or after + 1/2 hour of spooling the driver errored out. I didn't try on the PC. It is already frustrating enough to have to trouble shoot files that should print without problem. I am hoping that IP7 will be tweaked and profiles delivered as even though I have always preferred to use a driver for simple workflow, I need to print and spool files with no errors, no surprises.
If it's true that these printers cannot pause and continue a print job with a cartridge change , then the possibility to run unmanned production printing will have to be relegated to other printer makes that can.