@User: I thought that user_project_example is the actual user-space where we should put our design into, and user_project_wrapper is a thin wrapper around it to define the interface and the size of the user-space

@User: There is no constraint on hierarchy, you can do whatever you like inside

user_project_wrapper

. For small projects (small number of cells), you probably want to follow the example on the repo (your project = user_project_example), so that you don't have to place ~1k cells inside a ~10mm^2 area.

That is my approach already, to just adapt user_proj_example to my needs.