My Vape - Kroma R with Zenith tank. I am new to the subject because it is my first vape. But after using it for 3 weeks with the Zenith tank he gained a slight gap between the tank and the mod, it is not 100% fixed. I don't know if this problem is common or this kit has a defect where the tank is screwed. Everything is very tight and yet I feel a slight slack. Anyone with the same problem in this or other mods?