I designed this clip because this filament clip does a few things in combination that I haven't seen any other filament clip do to my satisfaction.
To attach this, you simply glue the clip to the inside edge of the spool.You will need a strong adhesive you are confident in staying attached to your spool. I use 3M 300LSE transfer tape which is really good at sticking to plastics that a lot of other tapes don't stick to very well.
300LSE transfer tape does NOT stick to cardboard spools very well though. I still need to figure out what adhesive to use on those but I haven't bothered because the holes for clipping filament on the cardboard spools I've used seems to be a lot easier on the filament to avoid snapping it than the plastic spools.
The author marked this model as their own original creation.