I spend a lot of time trying to shave a few dollars off 3D printing costs, and most of the obvious methods come with some penalty. Cheap filament can be fine, but I’ve also bought rolls that needed more drying, more calibration, or more patience than the price difference justified. Hardware upgrades can reduce waste, but they usually start with me spending more money and hoping the savings arrive later. Switching to filament refills was much less dramatic, and that’s exactly why it worked: I paid less for material I already trusted, stopped bringing home another plastic spool with every kilogram, and barely had to change how I print.