If you are using Bambu Lab AMS with the Copymaster 3D filament with cardboard spools from Technology Outlet UK, then you will need these adaptors that work perfectly and will allow the new style cardboard spools to rotate forward and backward correctly. If you try any other adaptors they will slip and will not function, you will simply waste material printing them. Even the official adaptors provided by Technology Outlet do not work. I also have this available on Printables.com. I am the original author and do not authorise any copying of the features for any type of remix of any kind.
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.