Since the last update, I've downloaded KiCad and learned enough(?) to create a basic schematic for the project, which you can now find under the "files" section!

I had to make my own symbols, I guess it's unusual to make a schematic for development boards wired together like this. But still it should be enough to be able to convey how it's all connected.

I've also made my WIP, learn-as-I-go style TinkerCAD designs for the case and screen holder public:

https://www.tinkercad.com/things/igAFacjZWDP

https://www.tinkercad.com/things/jHrsHk9PIVb

The bottom and top need to be printed in two parts to fit on my 3D printer bed - which makes me wish I had a bigger one ...I would definitely recommend printing the screen holder as the flex cables for the screen is fragile and won't survive long unprotected (at least on my desk, which is a mess where things get pushed around frequently).

I've tried bringing the current version of the PotatoP around with me in my backpack, which has confirmed two things:

The first: It's fun to bring it around with me to show off and hack on, and I wish I could do it all the time.

The second: It's currently too fragile for me to actually do that. Wires keep getting disconnected, the case pops apart, the keyboard shifts out of position and stops working until I disassemble and reassemble it. It's also pretty thick, taking up most of the space in my backpack when I do bring it, and as it doesn't have a proper hinge for the screen, I have to carefully and separately pack the screen and hook it up each time.

So my current priority is to keep teaching myself more KiCad, and design a PCB with all the necessary components such as the stand-alone Artemis module, but also possibly a (separate?) custom mechanical keyboard PCB with a similar layout - and a new, much smaller and slimmer 3D printable case for it all.

This should make the project much smaller, more robust, and much easier to reproduce as you won't need to source and dismember a very specific and somewhat rare keyboard to build it. It should also make it a lot cheaper to make one. It might even be possible to have produced a pre-assembled PCB with all or most of the necessary components already soldered on.

I have hope that even starting from 0, it shouldn't be too hard, as all the breakout/development boards in the project are open-source designs that can be mashed-up into a combined PCB. For now, I'm experimenting with smaller and simpler projects such as the DigiSpark from this nice Youtube KiCad 7 tutorial, and waiting to see if that project ends up working before making something more complicated. :-)

I'd love to hear your suggestions for what such a design should be like: should I break out a GPIO section for the unused pins? Should it use a lithium-ion-capacitor instead of a battery? Or perhaps replaceable (rechargeable) AA batteries? Should I add a tweeter for basic sound output?