Unlike most of [Ivan]’s creations, the spool holder isn’t actually 3D printed. For this job, he turned to a laser cutter instead, cutting the parts out of 5 mm plywood. A handful of layers of ...

[Jon Mendenhall] fixed this deficiency by designing a model roller coaster that accurately simulates a full-sized ride. The track and cart are all made of 3D printed pieces, which altogether took ...