Hi Shane,
If it helps my D4 on the weighbridge had the following (Starting at the front):-
ARB bull bar - (no winch)
Nothing extra under the bonnet
Nothing extra in the front seat area
The middle row of seats - Middle seat removed (-25kg) National Luna Fridge installed (+23) so no difference to standard D3/D4
- 120 Ah battery on the floor in front of the fridge (+36.5kg)
Back luggage area - Third-row seats were still in the car for initial weighing at the weighbridge, so no difference to standard D3/D4 (you will notice I remove them in the spreadsheet)
So the main difference from my weighbridge figures to a standard D3/D4 is the extra battery, extra 110 ltr of fuel and location of the spare.
From my spreadsheet, I removed these items from initial weight and came up with a weight of just over 2700kg with the standard tank full of fuel.
So you could start with an initial weight of around 2650kg and you would be pretty close.
I have a spreadsheet for doing the same calculations for a campervan or trailer if interested.
Cheers
Steve