In order to use this, you will need to print 2 and put one on each side of the spool. Features include crush ribs to prevent spinning of the cardboard against the adaptor, tapered ring for easy insertion, flexible holding clips, printed labeling, and low material usage.
I just started getting spools that are made entirely of carboard and the ID of the spool was rubbing on the spool holder above my MK3S, causing brown dust to rain down on my print bed. I designed these in Fusion 360 and printed these in PETG with .6mm nozzle, and they seem to be working great so far.
The author marked this model as their own original creation.