LPD Simplest Spool Holder

Edit April 2020: For some reason the remix source (Universal Filament Spool Holder by butchja) is not being listed anymore. The screw nut should be downloaded there, but since it is now somehow unlinked, I am adding the said peace to this page directly.

This is the simplest fully printable spool holder I could devise.

Background: Got my very first 3D printer which came without a spool holder. I then searched ThingVerse for one that would require no additional bearing, fully 3D printable, w