We have been having problems with the fuel level indications in the wing tank on my sA300. Finally traced it back to the sender unit in the tank. The wing fuel tank looks to have been made by starduster with writing on it to indicate a fuel gauge version. The flange looks to be the standard 5 screw one. Does anyone know what type of sender was used for that tank. Stewart Warner or Rochester? The level change for the tank at the sender location looks to be about 4 inches. Impossible to see the part number. The other question can you remove the sender without taking the tank out of the wing bay. The drawings I have have no indications for a sender flange that is found on the left side of the tank.