Auto centering spool holder: 51-57mm inner diameter range.
New unidirectional mod AKA belt tension torture test. This stops the spool from rocking due to retractions [bowden setup]. Engagement every 3.3 degrees. Most people will not need to print this. The "arm" fits 5/16 hardware. Scale up to fit M8.
Quick video: https://youtu.be/YrEHZ4koq04
.28 layer height [.4 nozzle]
0 top/bottom layers
10 walls [perimeters] - creates solid parts
supports for the Tusks only
During use some of the spool color will rub off on the edge of the "Tusks". Use a dark color to keep them from looking dirty.
Assembly manual in the images.