After fighting with spool rings breaking after one or two uses or being oversized and binding up in the AMS, I decided to switch my cardboard (mostly PolyTerra) spools over to Bambu spools by just ripping off the cardboard, leaving only the center core. The only issue is the ID is not the same, and the spool adapter I had previously printed, cracked right down the side when I tried to remove it from an emptied spool. This core insert takes care of that. The end results have been excellent. Thought I would share. STEP file available in “raw files” if you would like to make some custom offsets.
Happy Printing!!
For those that may not know the method of ripping of the cardboard off the sides of the spool, below is a link to view.
Awesome Cardboard Spool Hack For Bambulab X1 Carbon - YouTube
Noticing gaps on some of your spools and its causing binding inside the AMS? Print yourself a few of these.
Spool Spacer (Bambu Lab Reusable Spools) by Aesth3tix - MakerWorld