Besides my penstyle, I also have an 510. It originally came with the cylinder carts which seemed like I had to drag extra hard just to get a vape going, until someone suggested "whistle tip" or flat tip carts. I did get them but they don't seem to fit as snug as they should in the atty. It has a smoother draw, but what can i do about the fit? Or am I just stuck with what I have? Any suggestions?

