One more place to stash gear on a carbon road bike is to put a third water bottle holder under the down tube. You can buy straps from Zefal that give you the extra mounting points, and then use a bottle that is designed to hold tools rather than water (or use an old water bottle if you want). This is where I keep all of my tools so that I can use a seatpost-mounted rear rack. If your seatpost is carbon, buy a cheap alloy post to use with the rack. instead. If you can't change the seatpost (which is too often the case with modern road bikes) then this bike is pretty useless for this purpose.