With a recent campy derailleur you'll overshift by about 0.25mm on each click so it may work ok by playing a bit around.
I wouldn't recommend it. 0.25 is a big difference.
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1 Super Record bike, 1 Nuovo Record bike, 1 Pista, 1 Road, 1 Cyclocross/Allrounder, 1 MTB, 1 Touring, 1 Fixed gear