Spool Holder/ Feeder Arm Assembly.
Requires 2 of the handwheel parts, 1 of the Spool Holder Back part and one of the Spool Holder Front Parts.
Additionally you will require a M8 x 50 nut and bolt for the bottom tension handwheel and a M8x 100 bolt through the center. For full benefit a M10 spring should be used for tension in the recess between the back assembly and the front part.
The hex between the fron and back allows the feeder arm to be positioned such to encourage feeding smoothly from almost any direction and will redirect without risking the filament tending to come off the spool.
By using the spring between the 2 parts you can adjust the tension between the front and back assemblies which can cause a moderate braking force and prevent spool running away.
Particularly the back assembly will benfit from support.
Also epoxy or CA glue would be benficial to locat nuts and bolts in the respective hexes as appropriate.