Eryone Master Spool - AMS Compatible

This master spool is compatible with Eryone filament spools (tested on batches made in past 6 months). I found this more reliable than these spool adapters that you have to put on the rim of the spool. Simply peel off the side of the paper spool, clean up the inner edge, insert the master spool, flip the spool and repeat for the other side. It takes a minute to swap. After both sides are inserted, turn one side to lock the master spool (just to be sure, not necessary, the master spool holds in place the paper spool by friction).