Yeah, good idea, I’ve done a few experiments with splitting up the cuts like that, it’s got promise. I think you will start to see diminishing returns pretty soon here, and I like the look of this, so I am not likely to fool with it any further.
Also, I have a feeling that performance any tighter than this will depend so much on the materials you’re using, another thing I don’t want to get too deep on at the moment.
I am also now experimenting with tiny fingers (about 0.1") and sanding the corners round. I am not overly fond of the black and white look of fingers generally, but the experiments showed something unexpected. When glued the result is immensely strong and stable, far more than with my more usual (up to now) sliding joint, but the glue is needed even if a hammer or vice is needed to tighten the pieces. With boxes.py doing the math the rest is not difficult.
I do very much like your dice tray! I have had a big plank of it that (i Hope) but have heard many warnings about breathing the dust (and fumes?) of purpleheart and so have had concerns in that regard. Am wondering of your experience with it on such a point.