simple extruder visualizer

A 3-in-1 extruder visualizer, you can selectively print the design that you prefer.one with an auto-generated shape, one with crankarm, and one with my signature W.the shape is generated using kangaroo 2 + rhino 7print with brims, 3 walls, low infill for minimum moment of inertia How to assemble:use ⌀6*3mm magnetized-through-thickness neo magnet and EPOXY ADHESIVE (MUST) for best reliability (you don't want a magnet stuck dead on your E-motor shaft )if you do not have epoxy adhesive, consider gl