filament spool axle with spring-loaded clips

This spool axle takes 52mm diameter spools and uses two standard 608ZZ ball bearings. Feel free to use those higher-friction cheap ones, they are actually better suited because they'll act as a gentle brake. It comes with spring- (or rubber band) -loaded movable clips to secure the filament spool against sideways slippage.

One clip per tube should suffice, but two or three offer some redundancy.

To attach the clips, use a small rubber band through the clip's hole and over one spoke on the