As a newbie, the only other upgrade I have done is to replace my iPhone 7 battery. I had trouble on reassembly.

This is a great upgrade guide, but it would be important to me to see the reassembly instructions including the cautions.

For example, I had issues with reattaching the plugs in the phone. I could see having an issue with them here, as well as repositioning the display back into the cabinet.

I do PCB board repair work and repair pinball machines. But I won’t try this.