I have to replace the right 7700 shifter.
I am considering going to Ultegra 6700 10 speed.
I would get new Ultegra 6700 shifters ,Ultegra 10 speed casette and Ultegra 10 speed chain.
Will it work by keeping front and back derailleur ( Dura ace 7700) , Ultegra 6500 calipers , truevativ 39/53 crank set.
All existing parts have about 20k+ miles on it from 3 owners.
Thanks for your input