Gnergy, funny you should mention the underwater part. In 1996 my house and many of the neighbors houses were also flooded, since my reloading was downstairs and the water was literally waterfalling through the downstairs windows and my Forester trimmer was on the bench that the waterfall was landing on........you get the picture.
just so you know, I had completely forgotten about that until you asked why stainless, mind you that was not why I went with it.
My forester was rusted together and ruined because it was kinda the furthest thing from my mind at the time and i did not get to it in time to dry it out and oil it up.