Installed a racing seat and rails. I was quite careful during installation when maneuvering the seat into position. If the rail or seat contacted something, I made sure to stop and try to find a new approach position instead of forcing it in. Nonetheless, I still discovered a nick on the side of my tub next to the seat. I know it's really no big deal, that this stuff happens, and the car is going to end up with some wear, but I can feel the nick with my finger and my OCD is going crazy at this. It's really my OCD that's the cause of this, but I'm really surprised how soft the tub aluminum is. There was barely any contact; just a rail resting on the aluminum before being lifted off, but yet that still left a nick.