I agree with contacting SIG, they are good people. I would also bet there are very few of us that haven't pumped in more fuel than the tank could hold. One of the things you learn with time, about how much fuel you think should go in before you see it come out the overflow. But for tank to burst is very unsual, unless you are using one of the higher pressure engines, such as YS. Don't give up yet, the plane may be more repairable than you realize. I had a SuperSportster 90-120 that I bought used, Turned out to hav a totaly fuel saturated tank area. Sold it, another guy mounted a new front end, not as pretty, but flew it about 2 or 3 more years. Good luck, Andy