Replacing fuel senders in my rv7a but since I don't have a clue what fuel leaks with these sensors looks like, I would like some help to figure out where the fuel was coming from. I didn't use pro seal, just the rubber gasket the sensors came with(Stuwart Warner). The inside of the sender is clean so the only thing I can think of is that the fuel seeps through the threads on the screws. I have pictures but need help posting. Sorry that I am not technically literate.