So I recently got a $1 Filament Spool Holder from the clearance section from 3D Printing Canada. Me and one of the staff realized that it doesn’t fit though it has the little tabs in the default spool holder. I took it home and saw that it does fit but the connecting part is a bit too long. You basically have to sand down the part which you put into the spool holder arm until it fits. If you sand it down around 1mm, it should fit. I’ll be taking this to my school to use the sanders there and let you guys know how it turns out
Alright, a bit late but it works! Had to sand down around 2mm from the bottom of the part which connects to the spool holder. Fits very well and can mount a full kg of filament with ease!