Thanks Beachman.
It's the 2nd row seats that I want to pull out and replace with gear.
It moves the weight forward in the vehicle, and gives me the weight of the seats as extra capacity.
The vehicle already has bars both ends, as well as a winch up front, as a disadvantage in the GVM fight.
And I'm looking at 3.180T as max. with the Tvan on the Tow-bar.
I'm not sure what the Max. weight per axle is, because I haven't found that out yet, Toyota's site isn't easy.