I got that infamous rattle. Checked it out and one of the 3 small screws that hold that big center piece on came out. I put one in to replace it, tightened my plate and cover down with all four bolts and no more rattle, (except for that damn air escaping from the top front edge of the lid

) Just thought I'd tell ya so you all can double-check that all your screws are in for that piece. I'll try and get a pic up today if anyone needs it.