I'm not a 510/ego owner, so maybe it's nothing, but what did badkolo seem to giddily leak at the 9 min mark in the ce2 deluxe video? He unscrewed what looked like a fat tank from the battery, unscrewed the base, then coyly said "oh, what is this? ... I'll put that away". He also did the same thing with the battery: "what is this? a nub? ... what is this nub for? oh, I'll put it away". Just curious!