I'm probably going to have to purchase a new fuel sender as ever since I emptied my tank to fit a new fuel tank outlet and filter it's not worked .I stuck around 4 gallons back in and the gauge didn't move .Ive done the tests and it seems my sender is at fault,maybe stuck but not sure .Gsf have replacment senders for just over £40 but have 40% discount codes every other week .Are these senders as good or similar to the other usual suppliers out there ?