HI,
I created this Overture Cardboard Coil Adapter. I designed two versions, one for PETG filament spools, and the other for PLA filament spools. With these adapters you can use cardboard spools in the AMS without causing winding problems or excessive dirt/dust. The adapter has a very thin outer edge and does not cause rubbing problems with the AMS cover. I recommend printing them in PETG so you can put the coils in the dryers and not have deformation problems.