Ooh I'm over 50 with a titanium bike and more importantly have a Brooks saddle (every photo here does), which must make me highly likely to invest in a Carradice very soon. Am intrigued with a decent size saddle bag without having to revert to a rack underneath to support it - looks like you can get a bracket to fix to the saddle to hold the bag better, what's the biggest size you can get away with where the bracket keeps the sagging bag off the back wheel? I do quite a bit off road on Tripster ATR so hope it can handle a bit of the rough stuff without swinging around too much at the back