I really wonder how much something like the DID or ZAP actually costs, materials + machining time.
And then how much of a profit is made per unit on these items.
Sir Scuba is probably in the best position to shed light on this
EDIT: I guess to muddy things we'd have to consider that say Person X designs one of these puppies, but then he has to shell out to a machinist to mass produce (I think). So of course there is at least an extra step on the way to our price tag.
Anyway I think cheap is great, so long as it works. I too can get a Vivi or E1 humming like any of my more expensive units, but I do consider those more expensive units pretty and far more durable. I don't have any DUDs or Vivi tanks so I can't comment, but believe me when the Fatty and ERA knock offs start pouring in I'm going to be ALL over them lol.
The one thing I personally worry about from time to time, and BJ et al can attest to my neurosing here, is the contact of juice with mystery metals.
Its probably all speculation and tomfoolery for now, I'd like to see some devoted chemical testing, etc to see what's happening, if anything. Too much of what we conclude is safe or unsafe is based on what we can see, which to me, is ...well all we have for now, but a mere start at best.
And the more important question, what if any of the metal(s) actually manage to make it into our vapor stream and into the GI/Pulmonary system
If someone can riddle me that, I can actually use/access my field of expertise for once and answer the safety questions
