Unfortunately my son threw a rock out of our garage and it hit the top of the garage door and ricocheted into my TJ windshield which was parked right outside. Now I've got a nice crack dead lower center of the windshield with spider going out in all ways. So, I looked into local glass replacement, $170 installed. I also ran across Optic Armor somewhere on here on the past. It's $300, and if self-installed, that it. But I read the instructions and it sounds difficult. Anyone done it?