Help. I have a Cannondale SE 2000 with the force forty brakes and would like to upgrade to V brakes. My question is; can I use my XT canti levers with the V brake system? I don't really want to spend more money on a new shifter(7 spd) brake combo. I just bought these ones! It seems that sepatate 7 spd rapid fire LX or XT are impossible to find. Any help would be appreciated.