OK, looks like the US supplier told a porky when he said "On the boat, boat broke down"
But the shipping agent does now have a confirmation that they are on the water, and due in Adelaide approx 25th March.
He was also sent this picture.

With my BillBoard tyres sitting at the front.
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Cruising in 5th

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Never be afraid to do something new, Remember, Amateurs built the Ark: Professionals built the Titanic.