You are right about the speciality tooling and coming up with the spacers to accomidate the tool. The PO turned armatures with the lathe and that tool may have been the only one he found to do the job. Making do with what you have used to be the American way. I love ingenuity! I am now preparing to get started refurbing my Logan 1825. I am looking forward to that task.Cool, but now you will need an adapter to use that steady rest thingy that fit into the sleeve in your tailstock. Looks like maybe the prior owner did a lot of something and that tool was necessary for whatever operation it was. Split adapter is unusual? I would think maybe innovated by necessity, get 'er done tooling.