Summary

Connected the paint holder piece of the original print so that it can be printed all at once on larger printers (like my Neptune 4 Max). Hotglued to the spool (IIID Max filament spools - they can be cleanly separated in the middle by working a spatula around the seam and unplugging the top from the bottom). I also made a custom riser for the original model, because I don't think it was designed to be stackable, but with three spools of double-stacked paint, I can fit my entire miniature painting collection on one spinner.

If anyone asks, I'll upload the extension part.