Multicolor Un-Manufacturable Part

This print-in-place impossible screw has two interlocking pieces that twist freely but cannot come apart! A great example of an object that can be made with layer-by-layer 3D printing, but not with traditional manufacturing methods.

Check it out in this video: https://www.youtube.com/watch?v=jilYzgd4De0

The model is a remix of TheKre8Group's elegantly mind-bending [Un-Manufacturable Part](https://www.thingiverse.com/thing:1828613). We increased the clearance between the two parts, elongated the interior part with an extra twist, and added color to the inside twist for printing on full color 3D printers. We printed ours on the new XYZ da Vinci Color. The downloadable files also include models to use with dual-extrusion 3D printers and regular single-extrusion printers.

Modifying models to print in color has turned out be difficult with a capital D. For the full color model we used Meshmixer to "paint" the colors onto each vertex with the Sculpt tool. This sounds simple, except