Some printers have a new spool tube that has a "ring" near the base. I have updated the files to include a V3 of the caddy that incorporates a 36.5 mm hole to slide over that ring.
I HAVE NOT TRIED THIS VERSION MYSELF.
Please comment, and let me know how it works. This version can also be used for the original spool holder. But, I have included the original V2 just in case.
The original (V1) had threads to screw on the filament holder. There was an issue with the threads being to loose.
I re-did this and it no longer screws on, instead it goes on the inside of the filament bracket and the filament holder goes through the hole to keep it stationary.