Carrying gear on any sport/race bike is a compromise of some sort.
I credit card tour on a 15 pound carbon race bike (Record SuperSix HM) and having tried many methods of carrying the load on sport bikes (since the late 80s), I'm most happy with the gear carried as low and secure as possible
on a rack (skewers & brake bridge attachment points) and
panniers/bag arrangement or in a biker style backpack like
Osprey makes.
Cheers.