Well, Im definitely not the smartest person in this forum, but this one really has me scratching my head. I know that most mods have different airflow channel designs around the 510. But that is for older tanks,etc thar require airflow through the bottom. The Billow v2 should not be using those channels. I am now putting some different tanks on assorted mods to see if I notice any difference myself, just out of curiosity.