i was working on a new model of the B-53 (yes, that jet is out of retirement) and with the new wings i got this happens.
i dont know how to fix this but as you can see the bomb racks wiggle and move.
i dont want that excluding when the wing sweeps back.
Set the main wing as a structural wing. To do this go to xml and change it to, i think, wing-3. It will change the control surfaces though so you will have to move them back to how you want them.