Guitars are inherently cool. You can take the cool up a notch or two by getting a limited or special edition from one of the big manufacturers, or even by having your existing one customized. But youâ€™ll be hard-pressed to find one as cool looking as one of Olaf Diegelâ€™s 3D-Printed Guitars. We canâ€™t comment on the sound because weâ€™ve never heard one rupture an ear drum, but if they sound half as good (or intricate) as they look, expect to see one in Slashâ€™s hands soon. Until then, feel free to ogle this musical design porn courtesy of the genius professor of Mechtronics.