Hackers love 3D printers. In fact, they might love them a little too much. We hope know we aren’t be the only ones who couldn’t turn down a good deal on an overseas printer (or two).

mostly in STL, OBJ, or 3MF format, which turns them into instructions that the 3D printer understands, called the G-code. The G-code contains commands like how the nozzle should move, speed ...