I've been using an 80pg/20vg in a cartotank and find that I would like more vapor. I'm currently using smoktek 3ohm cartos pre-punched that come with 2 little holes. From the reading I've been doing, I'm under the assumption that vg is what creates more vapor, but I also read that because it is thicker, some cartos will not wick properly. Hoping those who use cartos with a higer vg ratio can chime in.