My 07 EX doesn't have a hitch. I would like to buy a bike rack to put on the back of the car. Is there such a thing that won't wreck the metal on the car? I had a Subaru rack I used and it put dents in the metal which need to get fixed. It's a nice Thule but it wasn't meant for the Element, but it worked. It was stupid of me, I know. Any suggestions on a good back rack?