K3 Improved spool holder for cardboard spools

Spool holder in 3 parts: The spool holder itself compatible with the K3 original bracket and the one I designed (here). Also compatible with the K3 double spool holder I posted previously. Allows cardboard (or heavy) spools to rotate easily around the spool holder thanks to the "roller" tube around the main cylinder. No bearings required. It's possible to add some silicon grease in between the cylinder and the tube to get even better spinning. Visit my Etsy shop ! https://labonneboite.etsy.com