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> On your second point my experience is quite the opposite. Take a tray of 
> full water glasses and hold the tray with your hands on the bottom and 
> walk around the room. Now hold the tray by its sides and try it again. 
> Which position feels more stable to you? Having your center of flotation 
> on the sides of your doubles is much more comfortable than having it 
> below your doubles (this is with the diver in the horizontal position, of 
> course).

Think about it this way Jim... if at little away from you is better than
closer to you, then why not go whole hog... put your buoyancy device
10 feet above you... or 20 feet... as I see it, it should come down to
simple lever mechanics.... lift 10 lbs in your hand.  Now put
10 lbs at the end of a 20ft rod and try to lift it.. it will
be harder.  The same should hold true (I would expect) for
the bouyancy.  To roll over you have to force a buoyant mass to
go deeper than it wants to.  Again, the further from the center
of rotation, the harder it should be.

Mike
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