And it's not only a matter of fragility. Style-wise too, that's the downside of the SD and GG too, looks unbalanced with the thin atomiser sticking out of a much more substantial (battery) case.
In the case of the SD, i would fit the lamp holder part back such that it encloses the atomizer, leaving only the cart extending.
In the case of the GG, a longer tube with the atomiser connection inside.
Both would require a bit more technical design work, and manufacturing complexity, but the result would be much better.
Tinear's design employing a fold-out atomiser is the best concept IMO, although that moving part could be a weakspot. Otherwise, it is not unlike what you have done and in the near future there will be VPs along these lines on the market, although perhaps with proprietary batteries.
Solving the power issue is straightforward. The big step is solving the juice problem - achieving a consistent juice delivery and allowing a larger juice reservoir. That's what I am woking on (prototype works, but I can't make it out of readily available parts, so biding my time at the moment).
* I understand about your voltage choice and you've made a great device that looks great.
