This is my first post! But anyways, I recently just bought a new setup from a local vape shop here in Knoxville. I got the Vamo v3 with the Kanger Protank 2. The vamo 510 threading is terrible, period. My cartos and tanks wouldnt screw in properly or even screw in at all. Took it back and got a new one and it's doing it also. And now my pro tank is gurgling and leaking in the mouthpiece terribly, but only when half full. If it's full it works fine. Which is rediculous. I love Knoxville vapor and they are great people and I'm not blaming them at all.