I posted this before the big crash... didn't get to see any responses. Sorry about the repeat.
I was moving my B-17 to a different bike in preparation for a longish ride, and discovered that one of the rails had broke. This is one hearty saddle, and the rails appear to be some kind of cast ferrous alloy. The only possible explanation I can think of is that the rail broke during a "rolling horizontal micro-adjust", i.e. during a ride when I slugged the nose to knock it a little to the left or right. (Won't be doing that anymore.)
Anyhow, to the question. Brooks sells a replacement frame (backplate/bracket assembly). Has anyone ever replaced one? Is it worth the trouble, or should I bite the bullet and replace the whole saddle?