I love the original design but it's way too big. Simply scaling it down for my needs resulted in stretched an ugly hexagons, so I reworked the tray insert from scratch.

I printed the tray in white Hatchbox PLA at 0.1mm layer height and the base in Galaxy Black Prusament PLA at 0.2mm layer height.

Note that there is some minor manual scaling up on the tray within the .3mf and .gcode. I scaled it to make it about 1mm wider and 0.5mm longer for a better fit. The .stl files do not include this so if you import the .stl and print then the tray is a bit small for the base - it will still fit but if you try you can get it to slide down inside over the little lip that holds it in place.

Enjoy!