I'm really enjoying this game.
My cards are pretty curved/warped and makes it hard for the cubes to stay in place.
So i made this card holder with slots for the cubes.
printed with 0.4 nozzle.
EDIT: Added a holder for sleeves based on the measurements 125x73
Resized it so that the edges of the holder were moved out so that the space should be in the right place.
The author marked this model as their own original creation.