Filament Feeder System for Snapmaker Artisan

For any number of reasons I prefer having filament feeding from inside the Artisan enclosure. For months I've been using peteryip's Snapmaker Artisan Enclosure Filament Holder, but had trouble storing and changing the spool holders, particularly because I had to print extra spools for smaller diameter orifices.
I wanted an easier way to swap out rolls, with better access to insert filament into the bowden tubes. I looked at a lot of ideas, but nothing fit the bill. While inspired by some of peteryip's ideas, I don't consider this a remix.

I printed in PLA with no supports other than for the Filament Coupler Holders. Orientation should be fairly intuitive, but I did print the Bases one at a time, at a 45° angle to keep them on the center heating area. I also had some problems with the Bases curling so I used Elmer's Glue Stick and heated the bed to 75° C. Be sure to let the bed cool completely to avoid warpage on removal. You will want to glue the Base Guides to the Bases, afte