A while back I received 2 Vision ViVi Nova's. One however had no air holes by the 510 connector to allow for any draw whatsoever. So I took it upon myself to make my own. It was easy with a tiny drill bit. It offers a less tight draw and more airflow which I so far seem to like more than the standard version 2.5's 2 air holes.
Happy vaping
Happy vaping
