I have a small ego style battery that the 510 thread stripped out so I moved on to bigger and better things. Recently decided I would like to resurect it due to compact size. I am looking fo a tank that actualy uses the large ego thread not the 510. I ordered a smok vivi mini nova with ego threading. got it last night and disapointed to say that it just has a skirt that covers the thread. looks great on my winder but not what I wanted. So does any body know of a tank that actually uses the ego thread?