I switched the MCP MCP23017 to a QFN type. I realized that in the end, everything was most likely going to be pretty big. The final product thickness is around 15mm or more.

So now I’m studying and researching to change the components, organization, and then properly design the mechanics in CAD/case so everything stays stable. I didn’t really know the display dimensions. Some are kind of generic, with chip data/technical specifications giving a certain thickness, but most don’t have thickness. Looks like I’ll have to message the Aliexpress seller to get the exact data…

I feel way more lost than I should. It’s annoying because I had already thought a bit at the start and there wasn’t supposed to be so many reconstructions/pivots in the project.