Had a meddle with the spare fuel tank yesterday just to get ideas on how to put it to use. There's a little surface rust in the bottom of the tank but otherwise it appears to be sound. After checking out can1991ram's thread and his great boat tank retrofit, I've grown more to liking the idea of a secondary fuel tank. Only thing was I wasn't hot on having to cut a hole in the middle of the floor of the tray for a fuel filler, so I've I'm going to investigate using the filler neck and hose from an L300 van and the idea of mounting it to the inside of the tray behind the tail light out of the way. I'll still need to cut a hole somewhere but it will be discreet and mostly out of the way of tray access and raising the filler neck should reduce the risk of water contamination. Meh, might not do it yet - got plenty of other things to fix before I start on a mod like this.