A number of Sl owners have confirmed that their tank is very slow to take the last 10 or so litres. I now think that I know why mine, at least , is slow to the full 82 litres. Apparently extra fuel ,after the pump switches off, overflows to the plastic expansion tank above the main tank. This is connected via quarter inch hoses to the main tank. Hence the slow fill for the last litres. Make sense ? ? Sean