I ended up overfilling the tank with diesel and got some leaking where the sender attaches to the top of the tank. The tank is stainless steel but fairly thin. I pressed on the top and some fuel leaked from under the sender. The screw in that vicinity is stripped. I wondered what the best approach to fixing this is. One option would be to use something like a rivnut. I am not sure of the flange would sit too proud for the gasket material to seal properly. Another option would be to try to go with a slightly larger screw and tap new threads. Another possibility would be to try to clean up the stainless and epoxy a nut to the inside of the tank wall. It would have to hold well enough to resist spinning when tightening the screw. Any suggestions or past experiences would be appreciated.