Hello All!
This Spool holder can be mounted as shown or directly to anything you can drill s screw into. The Wall Mount will hold a 8mm diameter metal rod that is pressure fit into the center hole. The Filament Holder Shaft will need two 22mmOD-8mmID bearings on both ends - again pressure fit with some glue if needed. Then print the End Cap and bore out with 8mm drill bit for a snug yet removeable fit. The Filament Guide offers a neat finish that keeps spool from tangling.
I Printed mine using a 0.8mm nozzel with simple PLA.