By the way, the instructions are a bit difficult to follow at first. I do see that I missed a small step involving joining the two boxes by Hammering a piece of sheet metal to join the lower cross bracing between the boxes. I did that part but there was an extra sheet showing 4 bolts that secure that piece between the two. It should have been obvious since they were wrapped in those piece of metal but since these boxes fit many different models, I assumed they were extra. Yesterday I discovered that sheet of paper detailing that step better. Let me know if you need any help, I will try to reply quickly since I just installed mine