Man that hurts to even read. Dropping over three hundred bucks at a tool show and then finding out it won't fit a single flange is just brutal. Those shows always get you hyped up with the demos and the deals, and then you get home and the thing is useless. Have you tried taking it back to the seller or calling the company that made it? A lot of those booths are small outfits but some of them will make it right if you push. If nobody will help, maybe you can at least sell it online to somebody with a different flange setup and get some of your money back. Hope you find a way to not eat the whole loss on this one.