There are tank RDAs out there like the Big Ben from Art of the Exhale. A tank is positioned above the RDA. The tank is basically a carto tank with an empty carto in the middle for an air tube and a small hole in the bottom with a piece of rolled up mesh inside. The rolled up mesh from the tank touches the wick on the RDA and feeds it that way. Pretty much automatic dripping with no need to worry about atmospheric pressure changes causing leaking or flooding like other designs out there(Kayfun, Taifun GT). Simple and genius. The Big Ben also has another cover so it can be used as a straight dripper as well. I want to see more thing with that design.
