For those who are interested, I did upload a few design- and schematic-files here:
https://1drv.ms/f/s!ArLO34aOjCBXm95HV3A8XegrOu66aw
Feel free to review them 
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The source files will follow the next few days (most likely on Github) 
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Edit: Just noticed that someone changed the topic and removed the “mockup” 
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