To complete the build, I added 6 little feet under the board. I used cheap end cap of shutters as short feet. For taller feet I added wine bottle plastic caos (I'm trying to keep low the bill of material).
The next step is to mount Raspberry, connect gpio pins and solder +5v connection to each button. The first picture shows +5v wiring. I know, I know, the 5v wires are of a different color, but I recycled some wires that I already had. The second picture shows gpio inputs wiring.
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