Long story short, I need a very last minute replacement (like, today) for my trusty but broken Specialized Toupe saddle. The only one in stock nearby is the Pro version with carbon rails. The one I have has metal rails and I have a Lezyne saddle bag with a quick release bracket that clamps to the rails.
Are there any reasons I couldn't clamp things to carbon rails, and would I notice much difference comfort-wise?
I've got a Scott CR1 (one of the older ones) and it's pretty stiff at the back, although I've got on fine with my current Toupe.