I just bought a Vaporesso Tarot Pro 160W box mod, and I am noticing that my Smok TFV8 tank is not fitting right on the mod. It jiggles and doesn't sit right on it, and it can be very annoying. I'm wondering if it's a problem with the mod, with my tank, or if they just don't fit well together, and if so what other tanks would you guys suggest that perform similarly?