Railcore II Frame Mount Spool Holder

10/24/2018: Edited spool holder to have thinner post - the extreme bulge section didn't help. File is spool-holder-thin

Note: jstevewhite [remixed this one again to a design I'm happier with](https://www.thingiverse.com/thing:3024088) - it requires some 1/4th inch rod and some threaded inserts but it's way less material!

This is a remix of jstevewhite's frame-mount spool holder arms - I got tired of knocking off one arm when I was removing the spool, and I wondered if you could get away wi