Repurposed Mk3S+ spool holder for Core One

I still had the spool holder from my old Mk3S+ and wanted to repurpose it to feed in filament from the top of the Core One (e.g. for very soft flex filament, which is impossible to be pushed through the PTFE tube to the extruder).

The spool holder slides onto this model and then attaches to the Core One with three 20x5mm magnets, which were glued into the corresponding holes. It easily holds a 1 kg spool, probably more (not tested).