Just remember to pay cash for your printer and you will be ok. By the way the ink although expensive is really special I think it has to be magnetic or conductive for the print head to spit it out. HP is looking to use their printer heads to inject accurate amounts of drugs into the body,isn’t that special.You think the current refills are expensive wait till they are filled with testosterone,dopamine,cocaine, or whatever. You’ll be able to have a tattoo that keeps you from getting pregnant, imagine that!