Fuel sender

Hello guys working with my daughter on her dart this week while I have a couple days. I may try to work on her sending unit if we get some of the other projects done. I grounded the blue wire at the tank while she was watching and the fuel gauge went to full, I take by the info on here that means the gauge is ok and the problem is the sender correct? I also spent a whole night on here reading about the terrible quality of the senders does anyone know if there is a good one being produced or should I just try to repair the one I have ? Thanks guys your input always is appreciated!
Tristarr Radiator repairs senders. Rebuilt Fuel Sending Unit Specialist