Oh my gosh - sorry guys, I had failed to notice all the comments here. My bad.
Short answer - The stealth accommodates P3 and 510 threaded
tanks the same as any other P3 does.
Long answer - When I bought the stealth I found that I could not screw down my P3 threaded
tanks completely. The threads on the original top cap were just enough out of spec that it would not allow the
tanks to sit flush on the body. Since this was bought through the classies post provape demise I turned to Bill (formerly of provape). I shipped him the stealth and he fit a new top cap on there that didn't have the same threading issue. All was well in the world. So basically it's just like any other stealth except the top cap has been replaced by a different stealth top cap so that there were no issues with P3 threaded tanks.