[alexiskai]

Great description of the procedure, that's worth bookmarking. The only caveat I would add is that when I recently rebuilt my 7-tooth, the new shaft had a couple spots that were wider than spec and we had to turn it down on a lathe. I suspected this happened because there are multiple lengths of shaft that you can order, and they get those lengths by welding two shaft sections together, so the wide spots were around the weld.