I'm still using the same tiny ST7735 color TFT screen, with a new PCB added to the back of it, containing just the microcontroller and a micro-USB socket made of the PCB itself — to make the whole thing as thin as possible. I will probably need to cast it in resin eventually, so it's a sturdy, one-piece thing. For now, for ease of debugging, I'm keeping it separate.

I will need to make at least one more version of that PCB, to include touch pads for switching the image on the pendant.