Some observations on the v2 Diver as I test its boundaries:
With the v1, if I filled the tank to capacity, leaving no air to create a pressure differential, juice would leak out of the pin (as we all know). With the v2, leaving zero air makes the first draws a bit dry - not dry hits, just tasting a tad off. Once you vape off a bit of juice, and create a small air pocket, it goes to normal, of course. I find this interesting, because the v2 behaves exactly like any other carto-type device. This is yet another significant improvement over the v1.
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I had gotten used to removing the v1 from a tank with the cartotool at any angle, even upside down. With the shape of the Enezlis tube, if there is juice in your tank, do not try this at home, kiddies! Having forgotten the shape, my hands ended up with about 20% of the juice in the tank as a protective coating.
I then started laughing at my sheer idiocy so hard, I fell off of my chair.
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Finally, the v2 is both more and less forgiving at the same time. I have found if I stick to the right amount of wick, it is difficult to get the build wrong. In this way, it is much more forgiving than the v1. On the other hand, the v2 is less open to experimentation. When I try a single strand of wick, I get gurgling and flooding (but no leaking!), if I try more wick, like 3 strands, it does not feed properly.
For 99% of customers, this is a major, major improvement. Sure, I like to mess around, but most people just want to build it, pop it in a tank, and forget it for two weeks. The closer ease-of-use gets to the "pull an analog out, light it up, inhale" experience, the more accepting the vast majority of consumers will be of this technology. Cheap, easy, mediocre products exist, but the high-end market needs to start making its devices more accessible to those who don't want vaping to be an engineering experiment.
Thus, the v2 is a step in the right direction, a device that is easy to build, and provided you stick to simple, straight-forward build methods, is a very forgiving device for the novice with little to no RBA experience.