I've already gone through the starter cartridge, doing the shaking bit, but since I had a large printing job, I put in a new midsized cartridge. That's the one that's in it now, with the low warnings. But I now have another 150 page job to print, so that's why I'm asking how far I should take it with the present one without messing up the job --or screwing up the printer.
With the information from here, I guess I don't have to worry about printer damage, so I can print and observe the output and re-start the job with a new cartridge when it's needed for sure.
That was the main thing, about damaging the printer itself.
Thanks !
Terry