Is the one pictured a newer version? I have two sub tanks and one version looks like the above picture and the second is similar but the center piece screws onto the deck and them the top cap screws onto that. The one that all screws together I cant use cause it will not stay tight in the tank base. looks like they didn't put enough threads on the end that screws into the base. Makes a mess after just a few minutes!! I've only been vaping for a bout a month so I don't which version is which! Old or new style that is! Anyone care to educate me?