I don’t know if newer PS5s are flat, butine isn’t. I imagine the stand won’t want to stay in one place very well. There are ways of solving this, but it will add extra complexity.
that's why furniture usually has feet. :) some feet, some rubber dot thingies from amazon... problems solved. Profile guages are also helpful, yes. though one wonder's why it needs to be perfect? In some ways, that might actually make the stand harder to use. more finicky