I am very happy with the saddle.
It looks fantastic, and it is holding its shape very well, it hasn't stretched.
Last weekend I did 110km total (a 50km and a 60km) in fixed gear mode where there is no option to have a stretch as you ride. The saddle wasn't a problem.
It hasn't changed shape to 'fit' my sit bones yet, but I do not feel uncomfortable. If I did there are techniques to speed up the process. (damp cloth for 30 min, let stand for an hour, ride for an hour, then let thoroughly dry for a few days)
I do ride with Santini gel knicks, for all my riding.
I am proud of the new skills, and now looking for another two tired Brooks saddle frames for two other bike projects.
Philip