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Longevity - Campy Nuovo Record, used and abused since 1974.
Worst Groupo - 1992 Shimano Ultegra 8 speed (except for headset)
Durable and well performing - Dura Ace 7700, Campy Chorus and Record 10 speed.
Well performing - Dura Ace 7900 (can't attest to durability, yet; only have 3000 miles on it)
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