i am surprised that you didnt figure out the juice flow control when you took it apart, PV...the afc and juice control are both controlled airflow ring. when you take it apart the next time, pay closer attention to the innovative ingenuity that was put into this deck.its like an aromamizer and a goliath v2 had babies...BIG babies.
i'll give a quick note here:
i got my Boreas yesterday and cleaned it and built it last night and have vaped 2 tanks already. this just might be the most awesome tank built as far as the ingenuity...its amazing. to fill, close airflow, which in turn closes juice flow. when filled, put top cap on, flip it over, open airflow/juice flow, then turn back right side up. when the tanks airflow is wide open, so is the juice flow...closing off ANY airflow in turn closes off juice flow. i like it at 3 holes open. super dense vapor and incredible flavor. the design of this thing is really very impressive.
one last note before i go shave dog ass:
after vaping a tank, i went to the bowl that i washed it in and found a loose o-ring in the bowl. i pulled the build deck off and found that the half inch o-ring fit perfectly in the very bottom piece of the tank...the piece that goes over the 510 connector. take a look at yours and make sure your o-ring is in there...you'll see the spot it goes in...this very well may have been the cause of your leakage.
after reading your post again...i realized that youre not happy with the airflow...re-examine it, understand it...i think this tank is an incredibly awesome design. once you find the connection between afc and juice flow, i think you will like this thing better...and that bottom o-ring, lol...
trust me, brother...this tank is super bad ass!!