About the rollers it depends if you just take them direct through the top or you just take the printer appart, you got to be becarefull about the the plataform where the the rollers stand, because if you use to much pressure than your designs come with stripes because of the plataform, I advise you to leave the ones on the side because when you print big designs you won't be abble to print the full paper because you'll have to leave some space because you won't have any rollers at the front, about the waste tank I just bout a reset chip and I'm using the same over and over just fill them with some cotton or paper to dump the ink