A1 mini spool spacer

I had a problem: with certain cardboard spools, with little filament left and therefore light, the spool would creep against the printer body, blocking rotation.So I designed a shell to be attached to the original spool holder to increase its diameter and prevent the spool from touching on the printer parts in case the filament struggles a bit to get out of the spool.It is easily fitted by slipping it onto the original, the tolerances making it slightly springy to stay put.Successfully tested.