I have designed a simple CR-80 card for Scottbez's splitflap display. I designed these parts using the size of the CR-80 card and the size of the hole punch needed to make these if you were using actual CR-80 cards.
The github for the display: https://github.com/scottbez1/splitflap
The prusables link for the module itself: https://www.printables.com/model/430122-split-flap-module-hardware-components
You will need to print:
44 - CR-80 Half Cards
4 - Axle Body: https://www.printables.com/model/430122-split-flap-module-hardware-components
2 - Top and Bottom: https://www.printables.com/model/430122-split-flap-module-hardware-components
1 - Of Every other file at: https://www.printables.com/model/430122-split-flap-module-hardware-components
I printed all these parts with a horizontal expansion compensation of -0.1mm and a hole horizontal expansion compensation of 0.1mm at 0.25mm layer height.
The author marked this model as their own original creation.