The SLEC tanks from the UK are the ducks nuts. The fuel feed line and clunk you set up and screw in to the front of the tank, there are two pressure/ fill barbs at the top and all the hose/fueltube fittings are recessed so if the tank slides forward, they dont get kinked. They are hard plastic with a square profile, very easy to make a home in your plane for , dont leak , no brass tubes to bend, no uneven unsquare "bulgy" surfaces , and are a good thing. Try em, I think the poms are onto it with these tanks.