I got the 3 ML one, and it seemed to fit fine on my V3. I primarily use it on my Icon, though. So my experience with the V3 was: attach it, hit the button, "yep, it worked", remove it, put it on my Icon. I know the VapinGreek uses one on his V3. But I don't know how often he comes here. Shoot him a G+ message; he'll probably see that first.