thanks ,I'll check this too.Check the vertical rods under them plastic covers under the bell cranks. They have rubber bushings in them and go bad and can make the wings sticky. The new FD75 have an eyelets now instead of the rubber bushings. You can change over to this. I did this to one of ours and am waiting to try it out. My right wing was sticking last year and I had to keep adjusting the balance of that side to get it to frown. Good luck