Anyone have the perfect sweet spot for the ivp4 with subtank nickel coils? As you can see, I'm at 20J, 330F, 1.6v and the coil is reading it's exact ohms of .15. It feel like a pretty week hit but when I move up to 350, I get that nasty hit gag taste. I'm using a vanilla custard tobacco juice that is 75vg. Anyone able to get a better draw out of this setup? Any advice on bumping it up a tad?