No, the cracking was no where near the contact points of the rack. I believe it was more from stresses of the rear window opening and closing. My dealership has done all the service on my Bronco, knew of the rack and replaced my top under warranty.
Just picked up a used Heretic light bar. Watching the video it calls to hooked up to #2, the 15 amp switch. I already have my RC amber/white fogs/spots hooked to #2,. #3 uses a 10 amp fuse, can I switch the fuse to a 15 amp?