Don't strain your brain:
Brass screws to 510 devices
Plastic Screws to remaining 510 threading
Small ring Threads into Plastic
Small screw is adjustable 510 contact pin
* device center pin MUST extend below outer Negative of 510
*Adapter will not secure on devices with short threading - will screw past threads, keep spinning and not establish a good negative path*
***NOT Designed for Center(BOTTOM) Air Hole Devices***
Heh brain possibly strained. I hope you are right.
I just want my cartotanks.