The idea came to me when I accidentally bought Bambu Refill filaments instead of the regular ones. Since I only had a limited number of reusable spools, I had to borrow a spool from another filament whenever I wanted to print with a different color. To prevent the leftover filament on the cardboard spool from getting tangled or messy, I designed this retainer ring. I assume it is not AMS-compatible (as I don’t own an AMS to test it), but I plan to design a compatible version in the future.

My Annual Report