HX are a bugger to identify, as things that helped in HQ and HJ don't necessarily help in HX.

Your best identifiers will be the full length headlining attachment bits and an N66 wheel winch. Unfortunately a console and courtesy light switches don't help that much in HX as they were available on base model, but the headlining was extremely unlikely on a non-Sandman base model. Having a 1950kg GVW helps heaps too. I'd be 97% confident it is a Sandman.