I wanted a better set of spool holders for the MMU3 and really liked the original design but need a place to slip in and hold a PTFE tube.
The 3MF file contains the basic shapes plus a negative volume that allows for it to slip over the right frame of the spool holder. The model will appear as a solid object but will slice and print with the proper hole.
PETG would be the preferred material at 0.20mm with default infill settings (15%). No supports or brims should be required.
The author remixed this model.
The PTFE holder and filament guide is designed to slip over the right frame and attach a 4mm OD PTFE tube. The PTFE holder was remixed from the official Prusa MMU3 version.
Should fit any basic remix of the same spool holder.