Just saw this grid rubber stamp idea and decided to make one, as I have access to both a laser engraver and CNC machine. I’m trying to come up with a design. I think optimising for the having large button graphics is preferable to recreating the grid proportions, to allow for writing a couple of characters or small symbol inside each 6mm square.
One thing I’m not so sure about is providing orientation markings, either row/column numbers on the sides, a small cross or lines to mark the middle, or none at all. Of course the grid itself has none, but when playing a grid you at least have the UI to orient yourself, so perhaps additional orientation markings are justified when starting from a blank slate and designing the UI itself. On the other hand, designing a UI with orientation markings in place could lead to unintentionally creating UIs which are hard to use without the markings… any ideas or preferences?