Some hints:Oh great! Something else to get totaled.
I do know I'm gonna mix up some 3 mg for this one. After my last DL nic overdose, I'm afraid to even try 6 mg in this tank.
For high power coils, keep close to a 2:1 ratio if width to ID. Eg. A 6mm wide coil needs ~3mm ID to have enough juice capacity in the wick inside the coil.
The limitless needs ~3mm coils so you'll have enough cotton to fill the holes down to the tank.