I messed up and bought a 3kg spool of esun pla+ which was way too large for the included spool holder that came with my mk3s+ and I couldn't find any large spool holders that didn't need like 40 extra parts. All you need to build this is the printed parts and 2 x 606 (skateboard) bearing. I would print in PETG with at least 4 layers and 20% but more would be stronger.
The author hasn't provided the model origin yet.