Hey Angie with the V2 questions..everyone's got their "sweet spot" for various juices, it's subjective I like 3.8 and at least 9.0 watts, but some I crank it up higher (mother's milk and now the replacement "Spoonlicker II" *lol*
Ed has his low 3.3vv and 5.2 watts with his right now..it's what you like..if you get a burnt taste back it down.