It is designed for use with an enclosure where you feed your filament from above. This is the first version and there are some things to improve,.but it's already practical. I printed it at 0.2mm speed settings with organic supports on my MK3s+ in under 3 hours.
Recommended printing parameters:
Once printed, you should SLIDE the spool holder onto the printed holder, NOT SNAP. It's a snug fit; trying to snap it on will be a PITA. Future iterations will probably address this better.
The author marked this model as their own original creation.