I friend of mine had his 07 tank start leaking about 3 or 4 years ago. The dealership had his floor marked up to cut into it to repair the crack. At the last minute, they went another route. They had a guy come in and plastic weld it. I'm sure if you called around, you could find someone in your area who has the tools to weld polyethylene tanks. He just sold the boat a couple of weeks ago, and it was still holding strong.