Well, I removed the roof rack today. Unfortunately, it wasn't on purpose. Was just coming back from vacation where I carried 2 kayaks both ways with no problems. Took mine off, left the borrowed one on and took it back to my buddy about 6 miles away. Coming off the highway, the front of the rack ripped out of the roof, kayak was still strapped to the crossbars in the kayak holder. still hung on at the back , but destroyed rack, dented side behind passenger door, and left some nice ugly holes where the bolts used to be.
Don't think it was too heavy, maybe 70 lbs? Holders were mounted on crossbars close to the edge. They are the J style holders. Kayak wasn't loose, or it would have come off when the roof rack ripped out. Not sure it can be fixed since it was just mounted in the roof sheet metal. It doesn't go into any sort of frame member, just a flange under the sheet metal that the screws go in to. Not real happy today...