I think the FIA should take a more, erm, shall we say "rigid" stance over flexible bodywork. I don't like the current situation, where apparently you can make your bodywork as flexible as you like, as long as you can cleverly arrange for it to pass the specific scrutineering tests. The rules should simply say that bodywork must never flex by more than a certain (very small) tolerance when in use on track - forget trying to specify precisely what it should do in the scrutineering bay. If the FIA suspect a piece of bodywork is flexing in use, they should be able to use any test they like to assess whether that's the case. And if it is, the team should be docked points for the past races where they used that bodywork, even if it passed scrutineering at the time.