Use Rayon instead of cotton. Solves the How Much question. Cram as much Rayon as you can as it shrinks, Cotton expands. Rayon wicks better (IMO).
Drill 1 of the air vent holes out with a 1/16" drill, the old Evods draw perfect like that.
I call this Turboing an Evod and it'd work I think on the old Protanks too. An incredible amount of vape from such a small tank.
My eLeaf GS Airs use a shrouded coil. It's actually not that bad rebuilding once you get use to it. Yes, I DO get more vapor from the GS than a Turbo'd Evod but honestly, I don't know if enough more to warrant the extra PIA coil rebuild. My rebuild eLeaf coils don't last any longer than my rebuilt Evod coils either.
Bruce in Ocala, Fl