Just wanting to keep this thread alive and to express my thanks to Tony (AKA The Great Yeti) for the exceptionally clear and comprehensive guide - the route from the Top-Box to the Fuse Box is surprisingly easy to 'thread' - but I would never have known it was there without this guide. In addition, the circuit diagram he emailed out on request was spot-on (and wouldn't have looked out of place in a published technical manual!).
We took delivery of our first Yeti a couple of weeks ago and are genuinely thrilled with it. As Land Rover Defender owners previously, we weren't sure we'd ever find a another car that we would have the same affection and admiration for, but so far, so good - "The King is dead. Long live the Yeti!"
