More fitting work, soldering up headers.

Stack from bottom to top:

1. Adafruit Feather M0 Express
2. Adafruit Latching Relay wing, Raspberry Pi Zero W
3. Adafruit Raspberry Pi Protosheild (I didn't do enough research on this - it's the older 26 pin header not the current 40 pin - fortunately the pHat I'm using works fine with only 26 pins)
4. Pomironi eInk pHat and power cutoff relay for Feather stack and SSD1327 OLED display and rotary encoder

Not on the stack:

• Neopixel stick
• Mcp9808 for feather
• Bme680 for pi
• Usb case connector