I made this simple pulley that allows yout to feed filament into the printer from below, might not work with really stiff filaments. I tried pla and asa so far and they work fine. Please note that when installed it reduces the z height by about a cm or so and can cause a crash if you print that high or use auto z align.
For assembly you will need 3 M3 screws and a standard skateboard bearing.
The author marked this model as their own original creation.