I personally wouldn't roll the fenders on a CSL. While there is an appetite for modified E9's, CSL's seem to be most valuable in original form. Plus if you roll the fender, you will need to roll the rare and valuable stainless arches as well. I would start with Carl's fixed camber plates to see if that lets you clear the arch. If that doesn't work, get smaller tires and give yourself just the slightest bit of stretch.