riderback: I don't want you to think I was ungrateful to you for posting those pictures for me. I went home and tightened the only screw I could find under my rear shifting levers. The levers still seem like they will rattle so I'm not sure if a loose screw is the problem.
Maybe rattling levers is an inherent problem on the 1998 version of Ultegra I have. I know the loose cap was.
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