just bought a new dmax any suggestions

Damian I suggest you have a look back through some posts re chassis cracking. Seems most cases have been put down to air bags.
The alloy tray will save you weight.
Cheers Pete

Most chassis cracking has been through bad driving rather than air bags.

I have air bags and new suspension on my rodeo and no problems.

I would do a suspension upgrade first and probably a power chip we went with the DP chip.

Other than that they seem to be a pretty sound unit.

hi damian jilley
i think before you proceed with mods
imho you should read thread 81850
although it's not about dmax /rodeo there is a message in it for all who do mods on new vehiclesirrespective of the brand

beware the consequences that may or can unfold
and the legallities you can end up fighting
note::
i am not scare mungering just taking a commonsense perspective of the imfo in that thread detail
make of what you choose to but its worth reading
just the same there is a message in it for all imho
cheer

Hi Damien,

I personally dont like alloy trays as they arent as strong as steel trays (although not all steel trays are built equal) and when Ive loaded the alloy tray up with wood or water, they haven't taken the weight over the years.

The last alloy tray I had took 2 years to elongate the bolt holes and fall apart carrying regular weights of around 700-800kg but I could over 10 years doing the same work with a steel tray

It really comes down to your intended use and amount of weight you regularly put on it. Most campers could get away with alloy and have the weight reduction as a bonus

On the other hand an alloy tray wont rust like steel can and if you do a lot of coastal trips or live near the sea it could sway your decision to alloy.

At the end of the day its horses for courses

Cheers Wilko