I've tried to ride a modern Centaur shifter with an old Campagnolo Chorus single pivot brakes (late 80's) mainly because I couldn't afford a modern campag dual pivot, and the modulation is crap due to the lack of return spring on the levers.
It's quite possible that the modulation may not be as great as you would expect from the old campagnolo brakes.
I've tried to ride a modern Centaur shifter with an old Campagnolo Chorus single pivot brakes (late 80's) mainly because I couldn't afford a modern campag dual pivot, and the modulation is crap due to the lack of return spring on the levers.
It's quite possible that the modulation may not be as great as you would expect from the old campagnolo brakes.