I was at a local B&M store today, just checking things out as I'm still very new and learning. Long story short, another gent came in with a defective coil in his KPT II. It was leaking out the bottom of the coil and onto the top of his battery. They told him his tank was defective, because the plug at the bottom of the coil, where the leads contact the battery, no longer had threads left.......... Red flag one.... However, they wound up selling him a mech mod and a rda. The sales man