I'm trying to set up and use a profile for my aircraft. I have set "Fuel Measurement" to be by volume (litres). When I enter weight and balance for a flight plan I can enter the fuel volume, e.g. 30 L, but when the corresponding fuel weight is calculated further down in the form it assumes a fuel weight of 1 kg/L and calculates 30 kg of fuel which is very conservative when doing calculations for ultralight aircraft with small margins. I can of course manually override this, but then I have to remember to do the conversion each time myself.  Is there a setting I can tweak so that the entered fuel volume is converted to the approximately correct fuel mass?