Has anyone had flexing at the top of the pinbox that you can see when you hit a good bump? Had a screw pull out and punch through the bottom of the front cap right at the corner underneath the clearance light. I know there is going to be some flex, and as this is a 2014 369RL, kinda expect it. I have a washer and dryer up there as well. It is right at the corners of the frame, both sides, so entire thing is moving. How much movement would you expect?