I was looking for a way to attach the Surco rack I had on my WK. I didn't get factory bars. I have some Yakima bars but they have the attachment for the WK system which grips the factory rails. I remember a member fabbed there own version of the j200 clamps. I found this write up which is interesting.//http://www.expeditionportal.com/forum/showthread.php?p=505607#post505607
They used flat stock attached to the rail mount on the roof. I know several have mentioned height problems with their setup.