Hi Scott, Thanks for posting the parts break down. Since posting my inquiry back in 2007 (has it really been that long?) I rebuilt three of these hubs and have some very good pictures of the rebuild process if any one is interested. I have a 39 Hawthorne Comet with the DD hub and a couple of spares I've pieced together from very scarce parts. The main wear items include the rod that slides the gear and the inner hub gear teeth and the three gears. I've become rather a rebuild "expert" on these hubs now. They are really nice on the old heavy ballooners and the stick shifter looks pretty cool too. Finding parts is a real challenge.