Hello, I am looking for a tank system to use on my GLV2, and I an looking for recommendations, I have used the Kanger T3 Clearomizer (bottom feeding), I liked it, but tough to fill and I don't like having an adapter to thread it onto the GLV2. What specific tank system have you had success with, or really like to use with your GLV2. Im looing for one that is easy to fill, durable, no adapter required, easy to maintain and clean and long lasting, ..... thanks for any advice.