Yep. looks like a soldering iron insid a plastic houseing. Not to mention the brass will corrode eventually, and not allow you to attach the top properly.
Just guessing of course by the way I think the design works and the listed materials. Obviously I don't own one, so I'm talking out of theory from taking apart my vape.
Sounds like SM55 has owned every vape known to man, woman, and child.
I'd imagine I'd listen to him on this one.
The PD seems vastly superior at inital glance. I'm sure SM55 can compare the two with great accuracy. Owning both at one time or another.
Rock on dude! I'm comming to your for comparisons SM55!
DD