I am hoping somebody has a solution. I am on my 3rd stock metal gas tank. Every one I install I tighten just enough for the tank not to move from the engine vibration. The weld that always fractures first, is for the bolt closest to my left leg (front tank mount) I have searched for plastic tanks and there does not not seem to be any. I was also thinking of tank sealer? I need a solution that works. Anyone have any success stories to share? Heath