Note that when you do the upgrade, the front derailleur requires the use of a barrel adjuster. You can either buy the 6800 version and install one in line on the cable housing, or buy the 8000 version which comes with one built in as part of the FD. Without the barrel adjuster, it's almost impossible to apply enough cable tension to get it to shift to the big ring or to adjust it to take up the slack later when the cable stretches.