Hey Paul, If you are vaping an atty w/ 1/16" holes, it is best to step up gradually when looking for more air. What atty are you vaping on right now. There are some atty's that just don't vape well when holes are opened up. Some do have a tendency to leak when opened also. I have found I prefer atty's w/ AFC. It is easier to control as you can open or close the air depending on what you want. I was a MTL vapor for a few years, but now have move to full lung hits. I am vaping an Odin on a Reo Grand right now and have found it to be a very enjoyable vape. I also have a Mephisto and a Doge incoming to add to my vape arsenal too. I think the Doge is more of a cloud type atty and might or might not last too long. Not sure at this point. It is due to be here today and then has to be modded to BF. The Mephisto is also due in today and already set up for BF by an ECF vendor. Word is the smaller chamber is supposed to be great for flavor, for a 22mm atty. I can't really see it being any better than my Odin's, as they are great flavor / cloud atty's, but i'm giving it a try.