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Is anyone experiencing an FSA freehub body not maintaining its integrity at the contact points with the cogs?

I am running an FSA RD-600 wheelset with a 12-27 Dura-Ace cassette and the 14, 15, and 16 tooth cogs (the stand-alone ones with the spacers between them and the narrow contact points) and it appears also the 12 and 13 cogs have ground their way about 1mm into the freehub body in the direction of the applied force. This has resulted in 1mm grooves at each contact point for the 14, 15, and 16, and apparent damage at some of the 12 and 13 contact points. The 12, 13, 14, 15, and 16 cogs are a different metal than the other cogs - maybe a chromed steel instead of the titanium of the other cogs - and all of these cogs themselves show no damage. I only have - maybe - 300 miles on these wheels and cassette.

Would appreciate anyone's observations on the situation or if other's have experienced the same.

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