As I recall, the tank lock flange was the missing link at the time. Someone from Israel I "think" was manufacturing the necessary piece and selling them on Ebay. If you did some searching you could probably come up with one, this set up was pretty popular a few years ago. Mine is made of some type of hard plastic, but I think he started making them in aluminum. At any rate, my plastic one has held up over 7 or 8 years no problem.