So I found a great spool holder for the MP Select Mini but it wasn’t perfect, I had to redesign or remix it. I found that the most spools rub on the bracket so I made it longer and I raised it slightly as well. Now it’s perfect in my opinion.
Here’s the original on the right and mine on the left to compare:
Here’s the link on Thingiverse:
Monoprice MP Select Mini Spool Holder Remixed Larger and Longer