So I bought my wife a 2006 limited xk and it has the factory roof rack with standard rails. My in laws were nice enough to give us their Thule Evolution cargo box so we can use it on our up coming trips. I put it on the roof and the u-bolts that come up from under the rails to attach the box are not wide enough or the rails are too wide. I've searched to see if and how people have put these boxes on their xk's because I can't imagine I am the only one. I want to know how I can accomplish this. Also has anyone removed the factory rails and replaced them with Thule rails? If so what parts and please post pictures of what you have done and how you did it. I'm a little worried because our first trip is next weekend.