On another, completely unrelated note, I just finished installing my new 8-inch 6-jaw "set tru" chuck on my lathe.
I wanted to upgrade the plain 3-jaw chuck that came on the lathe standard, especially since it did not have reversible jaws.
I thought that this would come in handy if I had to machine the ends of the ball screws. If not, I'm sure it'll be put to good use on other projects!
Here are some before and after pics: