I had CLR. Put it in my new Nautilus with vertical coil. Screwed that to my trusty old ProVari. Fired it up and was certifiably insane with OCD for two hours. I kept thinking..slow down, you lunatic! After 26 months, I've reached the promised land. I really hope that people that still smoke, give this an honest go. Looking back, I can't believe I settled for cigarettes and it's impossible to try and make most smoker's understand what they're missing. Ten times the enjoyment while you're saving your life. That's not an invention, that's a miracle. It's like trying to tell a stranger about rock & roll. But they will join us. One by one. Welcome to the OK corral. Sub ohm's go left--mentally stable go right.