My first submission for this site.

I really like the Gravity Spoolholders by Michael Fanta:

https://www.printables.com/model/10370-gravity-spoolholder-for-mmu2s

and thought it would be cool to have numbers on the sides to identify them. Wonko6x9 has some great ones, but I don't have the talent to work out how to color those numbers:

https://www.printables.com/model/31989-numbered-gravity-spool-holders-for-mmu2s

I spotted these hex blocks to fix down the Holder Base, and the smaller vertical one looked perfect:

https://www.printables.com/model/32203-fix-for-gravity-spool-holder-base/files

I did fill in the holes from the original base piece, mostly for the face to be smooth.

I searched for numbers and found these for dry box knobs which were perfect for what I needed:

https://www.printables.com/model/66369-multi-color-knobs-with-numbers-for-dry-box/files

These were printed on my Mk3S+ with MMU2. I used filament 1 for the letters and filament 4 for the base part, as that is where I had these colors loaded. I included my gcode as well as an STL so that can be edited if needed.