Polymaker Cardboard Spool Adapter 201mm
thingiverse
The original adapter is pretty nice. Looks good, prints fast and fits well on the spools, but is is just 1mm too big to let me close the lid on my AMS on my Bambulab X1C. Cut out the outer ring at 200.98mm and added an inner ring so you'll get 2 layer thick wall on the outer ring. Still fits great and now the AMS can close. Honestly could probably make the inner wall 1 layer thicker, but the center fit is so tight the outer grip isn't as important. Bonus, this adapter fits great on Inland cardboard spools too.
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