So I have an ego and I'm ready to move up. I was looking at provari just not sure if I'm ready for it cause it's sooooo big, same with lavatube. I saw a thing called rough stack that is pretty stealthy and it works at 3.7v. Just wondering if it's consistent 3.7v like the ego is consistent 3.4v (or 3.2v can't remember) with no dropping of volts as the battery gets lower? Also what are your opinions on the roughstack and also what would you do in my situation. All answers are welcome! Thanks!