hello I was wondering because I was reading some posts from other people about the BVC coils and someone from your office said there was two kinds of BVC coils one for the nautilus series and one for the k1 and et-s tanks. What is the difference of these coils as I'm about to buy the nautilus mini kit and heard the coils don't last long (also I know why so don't bother about that) and I want to buy extra coils but realized on one products which I was going to buy on eBay said it was for the k1 so is it safe to buy these coils for the nautilus mini? (As in will it work for the mini?) And also are the ceramic wicks a hazard? What possible injuries may come from this? And is a e juice with a mixture of 60% PG and 40% VG a good mix for a liquid?