bearfoil:
...if the spoiler panel (#4??) had been on the wing at water impact, there would be virtually nothing left to find.
The spoiler's condition is consistent with it being pushed up and off the wing from below by the much larger flaps.
FRP has a signature failure in high energy impacts that is unmistakable
In my experience (aerospace and motorsports) one signature does not fit all! Depends largely on which Fiber(s), the amount and direction of Reinforcing, and the type of Plastic.
stubborn conviction that the Vertical Stabilizer and Rudder were not on the fuselage at impact
Please make an argument as to how the VS and four of its entire forged lugs were together ripped up and forward from the tail section by loads achievable while in the air.