I hope you don't mind me answering your questions, as i'm the one who's build the model. Jan has done the painting and weathering.
The seatbelts are molded on from AA. The PSP plating are also from AA. The thing on top of the gunshield is a searchlight wich is a field modification. I've got another picture somewhere where they use a headlight from a truck as a searchlight on top of a normal stuart.