
Parametric Carbon Nanotube v2
Description
This an iteration on my original [carbon nanotube pen holder](https://www.thingiverse.com/thing:4626925) that adds a ring to the top of the tube to make the finished produce look cleaner. Optionally, you can disable the base and have rings on both ends to make it a bracelet / ring. The parametric model can be adjusted via *Customizer*, but it will take a long time (under a minute) to preview because I make extensive use of caching in OpenSCAD. Also note that high-res models may take hours for OpenSCAD to render. I explain the geometry [on my blog](https://anthologen.com/2020/10/23/modelling-armchair-carbon-nanotubes/).
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