I have redesigned and improved the “Bambu Lab Spool Cores” core from @kirifate. With my remix, you don't have to bend the start of the filament to hook it into the core, but simply push the straight start into a hole that runs along the diameter.
Printed it in PLA rather than PETG, but it worked perfectly. So much easier to respool filament, and I don't have to worry about tape getting stuck in the AMS at the end of the spool.
printed it with play but works perfect and was axectly what u was searching for. this in combination with the printed spools and a spool / wind station is life changing.