Use the top lead as your negative lead so that if it touches the wall of the coil chamber it won't matter. You will need about 10 full wraps on a 2.5 or 8 wraps on 3mm to get at least .12(you may get away with 9 and 7 since the top leg has extra length). I space mine ever so slightly by springing it out. And don't put the wick inside the coil by mistakeThe mini nautilus is working great on the eVic now! I think this first coil will be the one I tear apart and attempt my first vertical build, any suggestions?