just a few (silly) questions
VS broke in a forward motion : so why the bottom part of the rudder is missing?
Assuming that the horizontal stabilizer is made of the same composites as the VS it should have broken in the same manner as the VS,for the same reason and float similarly, never mentionned anywhere.
From the photos of the brazilian marine the VS was alone (no other debris nearby) as it seems to me that some parts with the same buoyancy should have been found in its vicinity as their course after hitting the sea would only be determined by the currents.
No other debris around the VS would probably mean that it attained the water already separate from the main part of the a/c...