Way better than two dozen tiny baggies shoved into the box!
I printed the bottom at 10% infill which wasn't nearly enough. 15% on the top was much better and didn't require much more filament. I also had to slice up the full STL files so that they'd print on the Mini's smaller print bed. I used this OpenSCAD file and some bash to do the slicing of each tray. Used Hatchbox 1.75mm Grey PLA for the whole thing, glued it together with hobby cement, then sprayed it with Mod Podge clear acrylic sealer.