An economical and effective tool to shape stems. (Useful to pipe makers as well as repairmen, I imagine)
https://www.youtube.com/playlist?list=PLFwwtvtKlXW-HJ9mijb5fRm-ncucTB80C
This man had a great idea on how to sand stems. Klingspor has a very large selection of sandpaper grits. I have rolls of sandpaper from 24 grit to 12,000 grit.