I have several 3D printers, and I’ve always been satisfied ... Just make sure you can get your hands on a stock firmware image for your printer before you start making any changes.

More affordable than ever, 3D printers are booming for personal, professional, and educational use. Here's everything to know before you buy one, along with the top models from our hands-on testing.

First, the mirrored image is printed onto a piece of transparency film with a laser printer. Then, once the 3D printer has laid down the first layer of the object, you align the transparency over ...