Feedback is welcome as I work on dialing this in. I'm very new at CAD, so any OnShape tips will be appreciated.
I printed top down with supports on the build plate. I considered slicing with Cura to use the tree supports on the outward-facing floor numbers. For the time being, printing at 0.2mm with 20% Gyroid infill worked well.
Thanks for your feedback!
See Mord im Arosa on the Board Game Geek here: https://boardgamegeek.com/boardgame/80006/mord-im-arosa
The author hasn't provided the model origin yet.