even if these are the real deal plume will not honor the warranty, so they're not much better than the knock offs. A lot of the knockoffs comes from the same factory and were sold under the table by the factory.
I think every one of my ecig suppliers will disagree with you on that. Just about everything is made in house and by a rare chance they may be able to source a single part like a chip. There are actually quite a few ecig/vape things they cant clone.. But the pax isn't one.
I'm sure your guy is right, he would have to know more about these things than me. I'm pretty sure I had read somewhere that the factory plume used sold a bunch of units under the table, but I could be wrong about that.