The MK4's filament input has some threads on the inside, this tool you can simply screw on that filament input and it sits tight!
No supports needed. Please check / ensure that the hole is 6.15mm in diameter.
Then simply put in the grommet. It fits in nicely. Next screw it on and attach your filament tube from the Palette3 (Pro).
Remix of @DirkVranckaert s design for palette 2.
Best to use Loading Offset (LO) of 131mm - will result in a Historical Modifier (HM) of about 68% then. (Shoutout to @Max385 for his input on this)
The author remixed this model.