Originally Posted by
noodle soup
Yes, have you?
I used 7800 for 70k miles, and test rode a couple 4700 bikes(purely for frame fit).
4700 isn't junk, but it didn't feel as smooth as 7800, and I doubt it would last as long.
no under tape wrap for 7800 made it feel smoother, 7900 feels substantially worse than 4700