So I've read alot about the Aussie Sub tank and install. It is a great system. My question is...Has anyone tried a different tank in the rear location? Excluding the aftermarket "long range" tanks. What I'm getting at is continue to use the factory dual filler neck and put in a factory junkyard tank from something else. I don't have my 80 yet, but I was just thinking. My understanding is that the sub tank for use in the US 80's just transfers to the main tank, correct? And we are talking about 17gal. My thougt is do some measuring, go to the junkyard and do some more measuring and find one that came with a fuel injection pump in the tank, filler located in the right spot and pick it up for cheap. Then use the factory switch and when you run low in the main tank, flip the switch and there you are. The reason for the junkyard tank is price and possibly more capacity and did I mention cheap. Has anyone tried this? Or am I making this more difficult on myself.