I noticed a couple of small cracks on the carbon fiber at the bottom of the vehicle where the aluminum plate bolts are. Th see are about 0.25 inch, not too deep. Looks like I might have bottomed out on a speed bump as there are scrapes near the crack. How does CF behave with cracks? Do they spread with age? Fixing it may involve removing the entire rear panel and that could prove costly. Is it worth repairing? Looking for advice.