I have recently purchased a PT3 and 5 extra replacement coils. After a few hours of use with stock coil, I had leaking issues so I replaced with the second coil that came with the tank. This happened again and I have read that the extra coils with the tank are not as good as the coils you purchase separately. So, I used one of my 5 last night and had leaking issues already this morning. I have been researching this for an hour or so and cannot find much info at all about the PT3. I do not over-tighten my tanks onto batteries. I have noticed that the pin inside the base of the tank does become more recessed than when I first attach the coil, so I took the base/coil apart and pulled on the pin a bit so that when it was all put together, the pin was flush with the base. However, one "vape" with it, and I have leaking again. I unscrewed the tank from battery and the pin was recessed. Anyone else have this issue? I am so frustrated here. Also, this happens on my ego twist, mini LT, and mini ZMax. I have tried everything I can think of to make this work. I hate wasting money and would have bought a PT2 but I was burning coils with dark chocolate mint juices. I was told that the dual coil would help with that.