I had a random thought and decided to write it down before it was forgotten.

Since each board is roughly the same size, including the boards that I am making, I think I will create a tray that has "slots" to hold the boards vertical and side by side. By doing this, it is hoped that I can put some vents at the top and allow the heat to rise. The idea is to get away from the effect of having lower boards "roasting" the board above it.

The inspiration for this was a glance at one of my older retro computers across the room. It features an S-100 bus. I will not be implementing such a bus, but method of board mounting just looks right.