Voron 2.4 Spool Holder

This a "robustified" version of a spool holder I found on this site.  It fits on the back of my Voron 2.4.  

What I liked about the original was the clever use of PTFE tubing for a bearing surfacre.  What I didn't like about the original was it seemed like it would break easily and it didn't mount squarely on the 2020 channe..

I made an offset that fits perfectly around the rear panel.  This mount feels strong and secure.  It sits at 90 degrees to the back of the printer.