Pieces and board printed as-is no problem. However, I printed the box with Cura's draft settings but adaptive layers and got some layer adhesion issues in the walls as they are very thin. This is just my own printer settings error- I'll reprint with a slower speed and at a higher resolution.
Thanks for the Thing.
I printed the box a little too fast / coarsely- for anyone printing this you may have better luck with slightly slower speed and higher resolution due to the thin box walls.