This easy to print model (just turn on tree supports for the small overhang) works with board games that are up to 88mm thick.

Examples:

Everdell, Wingspan, Terraforming Mars, Expeditions. . .

What won't work
Scythe man, I need a 110mm one (coming soon :?)

I used SunLu filament (deal on Amazon) standard PLA. The support is definitly strong enough for a board game weight . . .

I was messing with magnets ( that really expensive kickstarter that puts your board games on walls with magnets) but man. . a lot of work. I hit the wall a few times. . no movement, so it seems pretty darn sturdy.

Let me know if you like, want any changes (a bigger lip is possible)