The spool holder is just another alternative for the LACK enclosure.
It uses two bearings of 608 2Z (e.g. https://www.ebay.de/itm/20-St%C3%BCck-Rillenkugellager-608-2Z-Kugellager-608-ZZ-8x22x7-mm-Miniatur/292622440951).
The roll is removable.
Holder: 20% infill, with support!
Roll: 10%, no support
Knob: 30%, no support
Put the bearings into the roll first (it will fit!).
Then the knobs into the bearings (be carefull here, depending on the infill of the knob!).
Category: 3D Printer Accessories
The author remixed this model.
The spool holder has been made wider by 30mm to make the Prusament 2kg spool fit.