Cheers all, having seen Bryan's comments re forks / & "don't believe the parts pictures as accurate", and Seamus's about the later models T piece set-up 'anchoring' of the carrier (which is likely sited further aft) I reckon my bike is standard (phew) & DSS have sent out the later part#. All borne out by frame #s / fork #s and the different configuration of the later forks versus mine.
What a bloody waste of time....and a slow leaning curve for me!
Thanks...