Numbered bases for miniatures

EDIT: The "Download All" option seems to give some (all?) people issues, so if that fails, try downloading individually.

For when you have lots of enemies of the same type: Clear and simple numbering.
They are made to be printed at 0.2mm layer height, with the three top layers being only the numbers, so you can to a filament swap to a different color.
For the numbers to print, you can't use a nozzle bigger than 0.4mm.
They can attach to the minis with something like sticky tack or a reusable glue like Glue Dots or similar.
My reasoning for this is that they would fit most base sizes in the 25mm range (as they tend not to be 100% consistent).
The circle in the middle of the design is to make room for whatever you want to use to stick the bases in places, and not to fit the miniature bases themselves.

They are designed in Fusion 360, and I have attached the source files for anyone that wants to make tweaks.
1-9 are the same design, and 10-20 are slightly different, to make be