I got some more auspicious communication from one display manufacturer, but it might take a while.

Unitl then, work on 2.7" version will slowly continue.

meanwhile, the badger is ATMEGA328 based, which has low amount of memory, and therefore the display buffer is located on the SD card.

I haven't yet figured out is it possible to have the bufffer internally if use micro with larger RAM.

But it also can show images (or ebooks) stored in the SD card, so it could be that this SD card is available externally (?) (but the display will only work when SD card is inserted)

Early 3d sketch: