This quick print allows to stabilize undersized spools on the dispenser. I printed it with a 0.8 nozzle at draft definition and it's doing a great job.
Make sure that the fins are printed in at least 2 walls.
Printed in Hatchbox gray PLA, turned out perfect. Unfortunately, the inner circle is a little too small to fit on my (re-released) A1. I'll try scaling it up a bit to see if I can slip it over the end cap on the arm of the spool holder.