I'm using the 3mm rubies, airflow cap also about 1/3 open, stem fully closed. I heat with wand using T2 adapter at 490 until time out. That usually takes my Vi to the 2nd mark.
It took some time to get my T2 dialed in but after trying several different balls, figuring the airport, and other suttle features, my conclusion is the T2 is the perfect vape! No deficiencies in any area!