Shane, looks like that not only Chops and I believe that the Alko chassis is not up to the task in Australia, Bailey also appears to have that suspicious because they have developed an Australian version with a duragal RHS chassis similar to the other Australian brands of caravan and further more they went to leaf spring suspension.
I agree with you that the body is very strong and watertight and better that in many of the Australian made vans.
Here is a video where it shows the chassis in the Australian model
Rangefinder Prototype Testing at AARC