So I bought the kayfun Lite Plus v2 from VapeRoyalty.com, and it's awesome, came with the nano kit and everything, however I still find for my taste the air flow is still a tad tight even wide open. So what I want to know is if the russian has any wider of an airflow? Does anyone know the mm? Right now my local B&M shop has authentic Russians for $49.99 and I thought about picking one up. Any thoughts on this?