I would assume then that something similar to what is pictured below would benefit the aerodynamics in this instance? By raising up the trunk (possibly a lot) and reattaching airflow?
Is there a generally agreed upon relief angle (rear window angle off the roof) which should not be passed as far as aero is concerned? I've heard 15-20° is generally good. Obviously emulating the tear drop is optimal.
I should really just go and buy a book on aerodynamics and/or fluid mechanics... Any recommendations there?