Another victim of the 8-month-rebuild. I had the tank reburbished by a reputable shop. It sat for the whole time on the floor of the shop,sealed. It did get wet once on the top, causing the top of the sending unit to get some surface rust. I checked the connections today and they seem fine. I did run out of gas in the yard today so it must not had much in it.I added one or two gallons and it didn't rise the needle a bit. Do the sending units go bad just sitting dry in a tank? What should I check next?