Yesterday afternoon I just had enough time to make this photo:

into this dummy display placeholder:

It makes sure that when I need to try and test if it fits, I don't have to use the actual display to wriggle it in place.

Meanwhile I'm working on the rest of the body, I'll still have to see if I can do that in tinkercad, or that I'd have to learn a new tool, e.g. Blender or something similar.