I have a Brooks Swift on my C40 Colnago. There's about a 250 gram weight penalty for using the Swift but you know what, I could care less. I've tried a lot of saddles, nothing else comes close for me. I care very much about the contact points I have with my bike and no contact point is more important than the saddle. My C40 weighs 16 1/2 pounds now, for me that's light enough. There comes a point in one's life when you stop trying to impress other riders. I ride what I do because I enjoy it. No one is paying me to ride, I ride for fun, the Swift keeps it fun, not a pain in you know where.