I definitely think there is an optimal AF setting to a specific juice, build, and type of tank. I agree too small and your coil can be to hot, but too much air on an average mtl set up can also hinder flavor as well. I guess it mainly goes hand in hand with wattage. I agree with you on the prime and at least with my specific build, the most open seems the best flavorI do this often...start at the smallest setting and take a few draws..go to the next and take a few draws..then open it to the next and take a few draws again..when I get to the fully open setting, it almost tastes like I different juice.
It always amazes me how the flavour profile changes, (and improves) as more air goes through.
This baby is very well designed.
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