Almost 55hrs on this baby and the only leakage was from operator error lol. I didn't pull the tank up high enough when topping-off and the liquid went directly into the carto top and came out the punched hole.
I'm at a steady 4.2v and unlike DCs, alone, I'm going through 4-5ml/day vs 3-4ml with a DC un-tanked. I'm guilty of letting a DC go a little too dry, so with the constant flow, I'm thinking this contributes to the increased liquid quantity.