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Oh boy, I love this. Don't tempt me!
Is it held together in the middle by the microcontroller or is there a stretch of PCB underneath? Very cool but that would make me nervous 😬 >

My secret goal was to trigger electromechanical engineers. >

based and pcbpilled >

where do you order them? also can you elaborate a tiny bit on how. I tried pcbway and uploading the file but it has a lot of options a noobie like me is not super familiar with, besides it gave me a $400 estimate for 5 pcbs >

Jlcpcb is the cheapest by a good margin. >

Love the idea to connect the halfs via the MC. Will give this a try at some point >

Add a TRRS footprint and a few more tweaks, and you can make it a cheap split as well.