If you are not currently craving nicotine why on earth would you use it? Did I just read that nicotine is not addictive? That's a bunch of hooey! If it weren't there wouldn't be nicotine replacement therapies, injections, medications, seminars, hypnotism, or the abysmal backsliding people who smoke experience too often. Yes nicotine is addictive! I submit it is more addictive than a lot of more commonly-known-to-be-addictive drugs. I've got firsthand experience there. Go for zero nic by all means. Believe me, you wouldn't be missing out on a thing!
Why is there nicotine replacement therapies? With cigarettes you have not just nicotine but all sorts of other ingredients making up the soup of chemicals you inhale with smoking.
Chemical Dependency and Nicotine
I suggest doing some actual research and take note when you find studies if they are studies on nicotine alone or if they are talking about cigarettes which contain nicotine and if they use the word cigarette and nicotine interchangeably. Remember we aren't getting all the other ingredients from vaping as we once did from cigarettes.
I submit it is only addictive when first used in tobacco form. I've got first hand experience there. I've realized that it was the chemical makeup of cigarettes and how all those synergens helped to cause my dependence. That's why vaping works for so many people because you can still get your nicotine using the same hand to mouth motions as you used with smoking cigarettes. Others have found out they still need WTA's to get rid of the cigarette withdraws.
I also don't know why a non-smoker would want to start using nicotine unless they were trying to gain some of the possible good things from nicotine.
Nicotine Clinical Trials: Why Aren't There Any?
(taken from this link)
FDA announces nicotine not addictive or harmful.
In April 2013 the FDA announced they no longer considered nicotine to be dependence-creating, liable to abuse, or dangerous if over-consumed.
In their Consumer Updates, they proposed removing several of the warning labels from NRTs. They have now conceded that several decades of evidence from nicotine-containing meds sales demonstrates that nicotine has no measurable potential for addiction and presents no danger of harm through overdose.
Nicotine Replacement Therapy Labels May Change
http://www.fda.gov/downloads/ForConsumers/ConsumerUpdates/UCM346012.pdf
It is probably reasonable to conclude that the FDA would not be taking this step unless there were a significant economic benefit for their funders. However, since no one can demonstrate any harm from nicotine, and since it is not dependence-creating except within tobacco, there are no reasons why the FDA should not take this step. It is about ten years behind the curve but that is normal within medical practice (in fact it may be regarded as radically new, with such a short timelag behind the evidence).
It won't be popular with the ideologists, but the science does not support their view in any case. Don't expect the CDC or WHO to like it; but reality does not suit crackpot ideologists too well.
I'd still emphasize that a better "topper" means a better time vaping. I've heard many great things about the nautilus, and it would be my recommendation. The istick is a sweet little device that should work well with a nautilus, and I would suggest you consider that combo. 
