I made an adapter that allows you to use Inland (Microcenter) spool-less filament with empty BambuLab Spools. The adapter fits snugly on the Bambu spool and has built in notches that prevents the adapter from spinning. The adapter also fits tightly on the Inland filament roll. Purchasing spool-less filament can save you $2-$3 per spool as well as reduce environmental waste.