I tried bigdog7’s adapter, but it doesn’t fit an eSun spool without damaging the spool, (eSun spools are 54.3mm not 55. I decided to create my own universal adaptor that can be used with any size spool including mini spools. The diameter is 201mm and works fine in my AMS. Uploaded to Makerworld with step files. (Universal Cardboard Spool Adapter For AMS)