Guy and others,
There should be a way of doing more of these "after" and "before" sets of pictures in the gallery.
There may be ... propose it to the gallery staff and if they have the wits to do it they will surely try to help. Another way to do it is just like Robert did it. But this assumes an author has a website ... in any case it may be possible to do something like it through the gallery. Suggest and it will at least be evaluated!
cheerio, Andy and the staff