I was looking for a way to generate different cubes for printing a different cubes so I made this cube that can have the text on the face be customized using scad.

I uploaded 6 different stls as well to get started with that have 40, 50, 60, 70, 80, 90 on the sides. The idea is you can print each at that speed then keep them all straight as to which is which after you take them off the printer.

These cubes are 15x15mm but of course you could open then with OpenSCAD and change that if you wished.