Summary

The spool endcaps that come with the QIDI printer are ridiculously large and require that you unscrew them to swap filament. These give you a small 2mm lip to keep your spool from sliding off and allow you to get most spools on and off quickly.

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/liYeuciiLC8