Well – I went to collect her this morning, and apart from the small matter of £2500 of cosmetic damage it appears that Ruby is going to be fine. Which is a big relief. The new GS is narrower, lighter, and more responsive, but my GS is comfortable and wide, has the bars in just the right place to fall under my hands and has a smooth bit where my shin rubs against one of the hoses. Though it seemed unlikely when she was new, we have come to fit each other. And hopefully will continue to do so for the next 36,000 miles.