my thinking is along the lines of the interface of the wing to the wingstays ,wich happen to be paralell...
Excert sideforce the stay will bend in a paralellogram type motion this force could be used to unlock the spring preloaded wingfixation .showing full stiffness in a static load ,antil you feed in sideforce.
the same could of course work for longitudinal =drag force as well...
against this line of thinking speaks the difficulty to hide a mechanism.A clever layup of fibres would do the trick without it even be illegegal according to the
words of the rules only cotradicting the spirit of the rules..
Quit interesting that Newey was coming up with safety concerns with the f-duct ,but
has no issues introducing " intelligent "aero of his own thinking...