Spool holder self-locking

Spool holder to be use along with spool support or bracket.

You have to use 608zz bearings for smooth glide and M8 threaded rod and nuts.

The design is scaled to 100 in order to improve the curvature, you have to descale it in your slicer.

To be used along with:

https://www.thingiverse.com/thing:4310001