The guy who built it, Dave, is a bit of a whiz as far as DIY engineering goes and has built all manner of hunting related stuff..

The vehicle he is using is an ex Forest Rangers vehicle so it is quite well kitted out for stalking..For instance their is a loading ramp that stows out of the way up under the roof of the back box, and there is also a 12V electric winch in the back to help load carcass...

Personally if I were building one I'd go with the road tubing so the whole thing can rotate, but given the winch and the loading ramp, Dave probably didn't need that feature..

The Auzzies have some neat hoists for lifting game onto their hunting vehciles, but they are more like "mini cranes"...