I like having the filament slot on the top of the Original Prusa Enclosure for use with 2KG and 3KG spools when needed. I used the Original Enclosure Top Center Opening Filament Passthrough (slot) by Uko on my enclosure. I made a simple removable plug to cover the slot when not in use.
The author remixed this model.
I made a plug for the slot version of the Original Enclosure Top Center Opening Filament Passthrough that Uko remixed in order to close the slot when not in use.