Even on my derringer, I can set it up to go through a ridiculously small amount of juice. Shut the airflow to just a bit, switch to a single coil and turn the power down. Makes for a nice little mtl hit. If I run dual coils at .4 ohms, I can burn through a 10ml bottle in an afternoon. That being said... I've cut my juice consumption down to about 3ml a day. Tootle puffing definitely has its place.
I can't *get* the Derringer "really tight" at all; even with every last hole covered, there's still "mystery airflow" from somewhere, and it's too much for MtL. Reminds me of the Caterpillar... such an easy draw you feel like you're getting nothing, nothing, nothing... then OMG IT'S TOO MUCH!!! as I about die of a coughing fit.
Andria