Hello Tony, I first tried to fix the fuel leak on the cracked base of the connector with epoxy.. unfortunately didn't work out, so I bought a new fuel pump assembly.
I did Not have to drain the tank, I just run the car a little longer after the fuel light came on (perhaps half reserve) and then was able to remove the collar without spilling fuel everywhere (guess how I learned about this tip.. LOL). Before removing the external lock (collar), just try to clean the lid and all the surroundings as much as possible to avoid getting dirt inside the fuel tank.
As long as you are in the reserve and clean the lid you should be ok, one more thing, "mark" the position of the lid on the tank as this will ensure that you have an accurate reading afterwards, not sure about the Boxter, but on the Volvo the lid is not keyed (you can install it ant any position) and the fuel level reading was not accurate, therefore I had to do it again..
