Alternative spoolholder

My Vertex K8400 printer's built-on spoolholder is fitted with excellent roller-bearings - and that's a good thing... most of the time.

In this particular case, I have quite good filament that's wound on a spool with an unbalance in it: so every time the heaviest point goes over the top-center, the spool goes on for a bonus half a round & uncoils its filament in the process. As you can imagine, after a few spins, things are getting nasty.

This alternative version of a spoolholder doesn't u