While the RepRap project produced some functional printers, it was clear that nobody had intended to produce something for the desktop of the discerning designer. That’s where Layer One’s Proton and Neutron come in. If you're an open-source advocate, a tinkerer, and a designer with an eye for aesthetics, you’ll want one of these on your desk.
All the printed parts of the printer is right here. Proton was built in OnShape. Log in to remix your own version of Proton, it's free as long as you share what you have made. Visit our website for the BOM, CAD files, assembly guide and everything else.