I prefer campagnolo cranks without dustcaps. They are unnecessary and they only serve to trap moisture and dirt and accelerate corrosion. It is PRO to not run dust caps.
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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