The left tank on my Mooney N239SW has developed leaks around two access panels on the underside of the left wing.  The tanks were re-sealed 11 years ago by Weep No More which everyone says is the gold standard for tank repair but I am in AZ and they are in MN.   I flew the plane for two hours using only the right tank and the leakage rate for the left tank is about a gallon per hour while in flight.  However, while the plane is parked in my hangar, the leak rate for the left tank is abou