Hey guys, so i just got my new vamo v2 and im curious about one thing, i dont have any idea what RMS is but i see that its the best setting to be at, my cartomizer is a 3.1 ohm as my Vamo tells me, so in rms mode what should i do, use voltage mode or wattage mode, and if i should go wattage, what should i set it at, i have no idea of how wattage works