I have a 2006 m7 with the stock challenger track on it. 2000 miles on the track and the track clips are bending the outer lip up and its chewing up my sliders. This happened first ride so I pulled the junk clip and checked all the others out. None of them were bent this way so I put new sliders on. Second ride I got 40 miles in and bent another one. Shredded the slider. So I pulled that one and put a new slider on only to have it start doing it again. Are the clips worn out or are my drivers possibly doing this? I do sometimes get a wierd vibration in the drivers when I'm really hammering on it or breaking hard. Thanks for any help. I will get pictures of the bent clip I have now and how its wearing on the sliders when the sled gets here today.