Hey everyone. Well, just over a month with my joye510, and like many others, I think I'd like to try an upgrade like a battery mod. Perhaps the chuck or little chuck? I keep reading 5v is the sweet spot for favor production and flavor richness, but some also believe 3.7v from the little chuck is just as good as 5v. Those chucks are also a little expensive, though it seems the owners would definitely say it's worth it. Are all the high voltage ones huge? I care a little less now about the unconventional look, but curious. Anyhow, any suggestions for the next step forward would be awesome. Thanks everyone! 