How's your GVM going with van attached? I'm very close with van and a set of drawers will just about reach GVM for me. Can recommend Cruisemaster in Brisbane for weighing, great service and right price.
GVM is good so far, well clear, towing and not towing... but I am watching it like a hawk.
My prev tow vehicle was a 2015 Jeep Grand Cherokee 3.0L diesel with Sunroof, ARB bar, winch underbody armour, and to meet GVM/GCM with the current Van involved removing the back seats when expecting to use the extended range tank from LRA with 75L fuel.
I have a Hayman Reese tow ball weight scale but I also have unit to drive over (Reich Caravan Weight Control Orange 1500kg per wheel, measures 4WD or Caravan wheel by wheel - it's quoted to be within 3% but I note that my unit measures slightly higher than a precision weigh bridge like Pedders tow measure service), however it does get me wheel by wheel breakdowns.
I also use a freebie service (closer than Crusiemaster in Brendale, further than Pedders at Enogerra, and open at the weekends) - I go to the Upper Kedron Recycle centre and throw some cardboard to recycle in the back and use that to check my current vehicle weight with Fuel and Passengers noted. (Weigh in and out, down to nearest 10kg accuracy, and they calibrate real carefully so they can do a differential for charging for rubbish at their various control points). Last measure on Grenadier with roof rack before putting anything on it was 3.04t with 3/4 Fuel and two passengers.
So my next trip is next week with the Dometic CFX3 55 Fridge in the back and all the roof kit, two passengers and the empty jerry cans and full fuel (and air compressor and recovery bag and tools), and a thin sheet of polystyrene to recycle.
My coming wheel change tyres will go up but rims are a fraction lighter so net weight change ~0kg. I still have to move the radios (UHF and HF) over.
There is not going to be a lot spare but the van runs at a stable 180kg lowball weight (I am going to budget for 200kg) note: it's real centre low heavy round the twin axles and has levelling airbags. Plus 36kg Diesel to allow in the jerry cans.
Still allows for extra 100kg of luggage or things when towing (and more when not). I'll post my list of accessories and total weight round the end of next week.
BTW: I weigh all the pieces and run a spreadsheet.