I am on day 5 of quitting the habit..using chantix along with the nord rpm 40...curious about the 0.4 vs 0.6 coils that came with my kit and which to buy for refills. I used the 4 till today, thought I'd try the 6 to see the difference..using 10 wattage and gives decent hit and smoke..I am finding that I dont get the slight spitting w the 6....which I like. is this normal? or should I try lower wattage on the 4? thanks in advance.