I just got a virtual one hit extraction with my Omnivap into the VonG through the D020-D bubbler. It was a full bowl pack.
I used a single torch. I heated in a ring about 30% up from the bottom of the cap. I moved up slightly when the click didnt seem to be coming.
I also have the Omnivap airflow very open, about 75-80% (mouthpiece screwed clockwise).
Airflow is WIDE open. No restriction at all! Effortless and a pleasure. And the bubbler was completely whitewalled for the entire long draw, click to click. Even with the air flowing through faster, it was still pure milk.
The second cycle yielded only a tiny bit of vapor, only lightly visible for the first 7 seconds of the draw. Virtually a one hit extraction. It was still smooth as well.
And I had the airflow very open. Dead easy draw, and dense, but smoother vapor. Extraction as fast as can be without going even close to combustion.
I was aiming for 3 even cycles. I need to aim the single at the middle from the start. I dont realy try to zig it up and down. It is awkward enough for me. I think if you stick to the middle of the cap, you can get very even extraction from the bowl.
More practise now, looking for a consistent even 3 cycle extraction! My jarhead is still in slow boat transit since 5 weeks +. That should make the vapcap a much more replicable device I hope.
Have awsome weekends everybody!
EDIT- there is some restriction, but it is no problem at all. No worse than most vapes out there. And the Omnivap excells this way through water, with the open air.