tkg, link didn't work for me.

Anyhow, as it turns out, machining the propeller hub wasn't all that difficult. I just used the compound rest and a very small boring tool to cut the taper. Then I used a set of jewelers' files to file the keyway. Pretty slick actually. I'll post a pic later. Can anyone tell me how to embed a picture in a post?

AV8TOR1977 will any old magnet work for the hall sensor? Counter-boring a small recess in the hub should be quite easy to do, but where can I find the correct magnet?