Purchased a spool of AMZ3D filament and when I went to install it on the spool holder that comes with the Monoprice Select Mini (v2) and realized it didn't fit on. Bummer. So I took some measurements, opened Fusion 360 and created something that would work for me.

Made it really smooth and rounded so there's nothing for a spool to get caught on. Printed a couple of items with it this morning and it's gone well.

It installs onto the side of the printer the same way the original did (slide it on). The pictures above show how it looks with a 32mm center hole and a 54.5mm center hole. Both work great.

I hope you enjoy it as much as I do!

EDIT 24-Hours Later: I was printing things all yesterday and this worked PERFECTLY. With the squared-off one that the printer came with, I often heard metal "clanging" when the spool would turn hard enough. I didn't hear the spools at all yesterday. Absolutely thrilled!