Originally Posted by A.Winthrop

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...snip

PPS - One other thing, your very nice "starfish" design
600EX headset uses a proprietary pair of wrenches. These
can be found on eBay but the "starfish" lockring and
adjustable cup are also designed for use with a standard
5-sided, 32mm headset wrench found in any LBS or online
bike tools provider. The special tools are better but with
care, you can avoid bunging up the soft lockring and
adjustable cup with the standard wrench.
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