I totally agree with what you said here. There is a lot of "behind the scenes" costs that are overlooked by the consumer side. But they are literally adding one, maybe two, millimeters of space on the battery side of things. They could easily be adding that by simply cutting a small amount of material from the molds. They are very likely using the same chip, same contacts, same hardware. That makes it a "new, upgraded" product for minimal cost. While I think it is a smart production plan, my point was that it is kind of a crappy thing to do on the consumer side when they could have put out that nicer model right in the begining.
I also should say, I do not dislike Vandy Vape. I own, and use, some of their products. The pulse mech being one product I have and like. I own multiple of them as a matter of fact. The pulse 22 (own 3 that are all in use) and some other dual coil RDAs (don't use anymore, only because I don't use dual coil anything anymore).