So… I printed the original and it was an exact mirror of what the Galileo Extruder needed to be.
The threads are for PG7 (M12.3x1.25) but may work for a nylon M12 (M12x1.25) Cable Gland. Depends on your filament shrinkage and slicer settings. Worked with 1 filament for me with no issues, the other was too lose so I glued the M12 mount to the print.
*fan mount is still in the f3d files, it would not clear my wires. I added a small heatsink to the underside of the TMC2209. May not be necessary, but better safe than sorry.
The author remixed this model.