This is my wider MMU buffer version, I use it on my enclosure.
There is a narrow version (zip file).
It has to be used with my wider spool roller: https://www.printables.com/model/814801-enclosure-spool-roller-wider
Optionally, but recommended, it can be used with my Enclosure Wall.: https://www.printables.com/model/814850-enclosure-wall
The author marked this model as their own original creation.