I see. So is 25.4 the standard clamp size for cheapo quill stems?

You know, we should really start up a wiki that deals with info just like this. It's stuff that's all possible to find with some digging (sheldon's site, etc etc) i'm sure, but it would be great for someone like me (novice repairman) to have specs like these all in one place. Tell me this already exists somewhere? If not, I'll start the wiki...