Quick update for everyone who's been following.
The DSI→eDP bridge I designed now drives the 16" panel from the NanoPi M6, and both run straight off my 4S6P battery pack. I removed the 12V converter, so there are fewer parts and fewer wires, and it still boots to the desktop.
Next up is the keyboard + touchpad board. It's designed and ready to order. About $40 gets it made, including boards, shipping, duties and fees. When it's covered, I order it the same day and post the receipt here.
The full story, from a $50 bill to my own laptop: tagoslabs.com/story
Thank you for being here from the start. ❤️