Did you design that shroud? Looks like it will get airflow to the whole cooler, that's another problem with the precision shroud that I noticed, most of the airflow is going to go to the middle third and down, not much to upper.The way its designed with that first angle its going to work like the short side turn on a valve, the majority of flow when the velocity starts getting up there in the port will start overshooting short turn and mainly run the long side. That's the same problem with that first sharp turn and then the second turn is an engineering term known as vena contracta which basically means that when the air that is trying to make that turn at higher velocities it cant do it [just like the short side radius on the valve] and it will actually start building a wall and pinching the airflow off, anyway looks like a good design, what is it made of and where did you get the actuator?