A remix of a few components of the Filler Filament Holder to better accommodate smaller spools, such as 250G spools that have ~40mm inside diameter.
I remixed the holder to be shorter, and I remixed the bearing to be fully circular and to have a larger hole for the spindle. Spins pretty smoothly and doesn't fall out of the holder as easily when swapping spools.
The author remixed this model.
Filler - Smaller diameter to accommodate smaller 250G spools with a ~40mm inside diameter.
Plastic Bearing - Made a fully circular version with a slightly larger hole for the spindle. Spins nice and easy and is less prone to popping out of the holder.