Hello all. I have a '98 wide glide that is being built at the moment. I bought an arlen ness fiberglass heritage style fender. My question is, if i mounted a tombstone taillight would it crack from vibration and road conditions and When i drill the hole for the seat screw what should I use to secure the nut to the under side of the fender??? I'm clueless on body work but I'm trying to learn.