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 glue with resin, silica, or other heat-resistive adhesives; slot-in and friction-locking is not recommended as heat expansion and material creep can loosen the magnet;dip a small amount of adhesive to the magnet surface, and carefully slide into the hole; please try not to dip the hole with glue since the adhesive could lock air bubble inside and leave cavity inside slot, which could lead to failure;press the visualizer magnet side down onto clean surface to ensure flat mounting and eliminate wobb