I made this spool insert for bambus reusable spools because I didnt want to tape the end or force it into the little hole from the cardboard insert.

You may need to wind the end manually 2-3 times so it doesnt come out again. It is designed to be loose for better release at the end.

I recommend printing in PETG because I dont know how PLA will behave when you dry the respooled filament.

So far it worked for me but feedback is appreciated.