Originally Posted by chasm54

I'm a Carradice fan too, I've done a fair bit of cc touring with a Nelson longflap (even a Pendle for a weekend trip) on a sub-20lb roadbike. Not carbon, but really that's immaterial, and ironically it has a cf seatpost. But I've never been a huge fan of the bagman, and for some reason the trick with the buckles has never occured to me.

If I were the OP I wouldn't be messing about with racks on a cf frame. I'd either be going ultralight with a saddlebag and/or frame bag, or I'd be getting light steel tourer for going fully loaded. There comes a point when compromise becomes a pain.