The special scalloped headset wrenches may be desirable to fit the 600 EX headsets, because while a regular 32mm HS wrench fits, using one tends to ovalize the top nut, presumably because the cutouts weaken the nut. 2 alternative solutions for those without access to the special wrenches: 1. keep a stem in while tightening the top nut (you may score the stem a bit, but you can use a junk one), and 2. use another, beefier top nut.
Regarding last-minute bidding on Ebay, there is a famous result in economic theory that the optimal bidding strategy given reasonable assumptions under a second price sealed bid auction (where the highest bidder wins the auction but only pays the second highest bidder's price) is to just bid the maximum you are willing to pay, as this maximizes the objective (value-price paid). As Ebay has their auctions set up this way to a close approximation, you might want to eschew last-minute bidding in favor of just bidding your maximum value. Might save a lot of people a lot of time & adrenaline. William Vickrey wrote a paper that included this result in 1961 that helped him share the 1996 Nobel Prize in Economics.
Bill Strang Arlington, VA, USA
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