I have been vaping for about 3 to 4 months now. I started out on a Protank 2 with an EVOD multiple voltage battery. I carried that around for good while. It just got too expensive to keep replacing the coils seeing as I had no idea you could rebuild them, so I decided to take a look into mech mods and go with a dripping atomizer. After I did my research I decided that rebuilding a dripper is quite simple so I went out and picked one up. I am now currently running a K100 (Efast 2000 18650 battery) with an IGO-W running at about .8 ohms. I was wondering what the benefits are between a dual coil setup and a single coil setup. Thanks! 