Weight of a fully modded touring GU.

[GRA.GU]

You're one of the sensible ones that actually thinks before he mods, lortapug. But as ET has said, you can't have it all and be under the GVM. And if you are over it, apart from legalities, you take your chances on exceeding design specifications and so jeopardise reliability.
Some things are more specialist than others, for instance,if you're constantly in rough country perhaps rock sliders are desirable, but if you're touring the outback they're so much extra weight. Ditto the rear bar. Weight is probably our biggest enemy - more so I suspect than the infamous "Grenade" issues. I'm very mindful of it when making my decisions eg. I choose the inconvenience of no fridge slide, even though I had one, because of its weight. I also stick to 235x85 tyres on original rims, partly for the same reason [I can carry 6 of these at less than the weight of 5 of many of the larger wheels].
Despite my concern with weight I still find the need to compromise eg I' ve fitted drawers [approx 45kg] to help organise myself, but I do normally travel with the rear seats removed. I choose to run with jerry cans for water and fuel, and I have dual batteries, bullbar, winch, and roofrack with 6th spare and awning attached. I haven't weighed the truck recently, but from memory with these mods I'm running very close to the GVM with driver and fuel on board. So my advice is only install what you think you'll really need, not what others are fitting for fashion statements.