I need some help. I have a Kimball artist's bench with a clever hydraulic mechanism for raising and lower it. Kimball, of course, is out of business. The hydraulic mechanism stopped working the other day--the bench just drops down to the bottom of its range with a clunk. I could live with this, but I'd rather not. I talked to a friend who does lots of machine work, and he thinks it's fairly easily fixed, particularly if we can find anything resembling a service manual, a technical drawing, or anything that would show the parts needed. (He thinks it's most likely an O-ring that needs to be replaced, and that can be obtained at any auto parts shop.) I've just been looking online, though, and can't find a trace. Any ideas? I'm willing to entertain suggestions for a replacement bench, but I'd prefer hints about repairing the mechanism or at least finding documentation. I'd prefer not to join the legions of piano owners with broken benches, but I admit that until the other day, mine was one of the few artist's benches that actually worked right. So it may just be fated.