Well, I returned the tool post to Shars for replacement or repair. I called twice about it after my tracking number indicated it was delivered. Strange place. They answer the phone "Hello" I had to ask if this was Shars. All in all, I spoke to four people who weren't much help. However, the toolpost came back today and it works OK...barely. The wedges, especially the troublesome one, seem to be a little fat. The tool holder has to be dead straight to drop on. I suppose for the money, it is OK. Unfortunately, the quick change feature is handicapped by having to fiddle with it.