Esun cardboard spool refill adapter

This adapter allows you to re-use the sides of your esun cardboard spools to make a refill compatible spool! All you need are this 3d-printed adapter, 2 cardboard sides ripped from an empty esun cardboard spool, and 4 m5 bolts of at least 12mm in length. I might update the design later to make it all fit a bit more snugly, add some more spikes to grip on the cardboard better, and slightly enlarge the holes for the bolts.!!! AMS (LITE) COMPATIBILITY NOT TESTED !!!