The purity of you atty system Zen is without a doubt the way all PV's should be, some may laugh at me, that's why I'm using the Ego-C system, a small wick and coil...that's it, the poly-fill carto material is not fun to inhale and probably not very safe so I no longer use them.
Dare I ask...would it be within the realm of possibility to develop your atty/
tank system for use on an Ego/KGo size battery, I'm betting you'd turn a lot of Ego heads with that one.
Continued success with your fantastic device.