fergenheimer
Getting comfortable
I've used an electrical box cover on the back side of the soffits to distribute the weight. Not enough for heavier cameras but you could put the aluminum flat stock on the backside also where it won't be seen.
Steel City 4 in. Metallic Blank Square Electrical Box Cover 52C1-50R - The Home Depot
Cover for built-in mounting in the wall/ceiling using 4 in. Flat and Blank Square Box Cover. This box cover offers 4 tapped screw holes for quick installation. Cover is also UL listed.
www.homedepot.com