Changes:

The INA board is soldered to the hat, no more loose wires

Screw terminals instead of pin headers

Wider traces for the power-relevant connections

I made the board a bit larger so that the screw terminal screws can still be reached with a screw driver when another hat is stacked on top:

Side note: My Zen Toolworks CNC has turned out so useful for prototyping, it is easier to make a PCB with it than to solder it on a protoboard. One step closer to the dream of thinking of something and pushing a button on a machine that makes it. Plus, it is so much fun to watch the machine mill: