Sorry, I did misread your leaking comment.
My advise about filling more (what I would want) was intended for anyone buying Hussar RDTA. Shoulda made that clear. I know you're cool with yours.
BTW there actually is an RDTA which comes with an optional BF pin going to the deck, not the tank: the Ashura. Works either as a top fill RDTA or BF rda. Kind of an oddball. Though you could fill the tank with one flavor then squonk a different flavor when it runs out. Coffee then tobacco perhaps?
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I remember seeing that and thinking it would be Very Cool if it was Side Airflow instead of Top Airflow.