This is a remix of a design by OneBadMarine (thanks for this OBM ) due to the fact that my filament does not feed from above. This design enables you to feed from above or below.
Use any cheap 608 bearing. If you do not want to use bearings then go to OneBadMarine's original design and print the wheels from there. I seem to remember that he had wheels with and without bearings.
What ever blows your hair back