Couldn't help myself, I ordered the blue along with a blue Velocity deck Derringer.
V3? Heat insulated? I'm guessing they put a better insulator in the 510 to accommodate people who like to build @ .05ohms. Hopefully it will raise the positive pin up to standard height so most attys will work without fiddling.
I bet they still have the same crappy hard plastic bottle. If they'd just use the same plastic as HCigar, Kanger, and Eleaf it would work like a charm. Personally, I like the HCigar bottles with the O-rings even better than the SuperSoft bottles.