So....one of the few devices I utilize on my mods is a smok Vivi Nova pyrex tank. I have used it on my ego devices, and my silver bullet. I recently made the jump to a ProVari which I absolutely love. Only problem is when the SMOK tank is screwed onto my ProVari, it completely blocks any and all airflow. I cannot get any draw on it unless i loosen it to the point that it is very very loose on the PV and will not stay attached. Does anyone have any suggestions?