I've stacked boolean on top of boolean on top of boolean to get to this shape:
However, there should be some other cutouts on top, and it's ignoring them...
Sharing the blender file... https://gofile.io/d/Bl8FGQ
not sure if someone can figure out why there's no nice cutouts.
What I want is to have a perimeter like the bottom, but on top... so there should be tiny holes up top, I would think?

