How tight is a draw at biggest hole compared to Nautilus2 wide open ?
I just did a side by side with the new nautilus S2, but the airflow on that is the same size hole, with multiple spread out, so kind of hard to say. But with all the holes open on it, it's about the same airflow as the Flint on the biggest hole.
If you want to direct lung, I'm not sure this will do it, but it does give a nice wide open MTL option if that's what you're after.