If you bought one, you've probably learned about the threads being made of very soft aluminum... They strip out fast if youre like me, constantly changing out atty's, tanks, and carto's.
The build is pretty decent for a cheap as heck mechanical (12 bux for the body alone), but it only accepts 510 threading, sooooo....
The threads are junk, as I said. SOLUTION!!!! Buy yourself a 510 to Ego adapter, screw it in tight, and leave it there. I did so, and my worries are gone.
Problem solved!!!!!