Digital BW, The Print

I've been refilling MIS carts in a 1400 for about two years. As far as I can tell, when the MIS carts run out, they just run out. They don't notify you or stop printing. My SOP with them has been to top all the inks whenever I top any of them and always check their level before beginning any important printing. Otherwise, I leave them alone until I run out. 

This said, I have been using five sets of ink in the printer - two color and three B&W. I recently purchased a new 1430, which is a dedicated color printer and the old 1400 is a dedicated B&W printer. I won't need to be changing, and therefore inspecting, my cartridges as often. I may need to rethink my practice.