I am thinking about getting this. I've been using a kayfun Clone for about 2 years. The threads are worn out. I see almost all the more modern atomizers are coming with the tip that is a more open circle. My understanding is that makes more of a lung hit. I don't like lung hits. I like mouth to lung. My friend tells me you can achieve mouth to lung by closing the air control. Is that true? Can I get mouth to lung on this?