Minimalist but versatile Ultimaker spool holder

Not very complex but does the job well. I needed it for some more projects (namely heterogeneous spools, or my spider spool http://www.thingiverse.com/thing:234040 for raw coils)

The STL is for a 8 mm threaded rod, and it embeds an optional nut in the background.

Still, you can customize it for other diameters, you could tailor it for a chopstick, as it would be a good candidate in place of adding a PVC tube as I did. No need to publish tons of derivatives ;)

The customizer on my thumb