Ok folks, I think I've read in just about every "How to fly
sailplanes" book including those by Piggott and Knauff that you don't
want to add ballast using an "under the deriere´ (never could do
French)" type. If you are going to add ballast make sure it is
attached to the airframe and not held on by your butt! I think this is
in a couple of POH's I've read also.

Bob (who unfortunately does not have a need for ballast)