Bambu RFID holder for v3 Sunlu spools

A holder for Bambu RFID tags that fits the new V3 Sunlu spools - the ones with the rectangular label, and ridges around the center hole.

My design requires no glue, and fits very snugly in the spool - no risk of the holder falling out and jamming your AMS. 

Will NOT fit the older v2 spools with the trapezoidal label, and a smooth center hole - the hole sizes and spool diameter changed between versions, and this one would be far too large.