Questions about HID over I2C, Audio, etc.

[DefenestratingWizard]

Nice video, few questions:

• Are you aware of HID over I2C? It seems like it might be useful as its one of the main protocols modern touchscreens/touchpads on laptops use (could potentially make finding replacement touchpad easier and make keyboard docking smoother).
• Have you done anything special with the audio DSP? Asahi linux has some examples that might be good to hack on for smartamp (speakersafetyd), dsp, perceptual bass enhancement (bankstown)
• Glad to see someone adding a gas gauge chip (coulomb counter) on their diy battery pack, are you aware of the smbus battery standard? Implementation might allow off the shelf batteries to work with your laptop (this may understandably provide space constraint issues)
• I can't seem to find your device tree source files/firmware files, are they in another repo?
• How much did this all cost to build?

About trackpads:
If you are ever interested in custom multitouch surfaces I'd highly reccomend looking into projected capacitive touch sensing, its a bit trippy but its basically row column matrix scanning with capacitive sensing techniques.

Sorry for the ramble, I really like your project and love seeing people make these kind of polished devices, and want to see this maybe become more popular.