Bambu Reusable Spool Sleeve for Winding

This reusable spool sleeve isn't for adapting any other specific spool (though it may work for that, I haven't tried), but specifically has a retaining slot for the filament to clip into when winding from one spool to another, and allows for the filament to easily release when it comes to the end in the AMS.

The slot is cut in at an angle to avoid the need for any supports.