I notice that some have bolted through the top hole on the Stebel mount and made an "L" bracket. I used the side mount (slot) and used the original flat bracket with the horn at 12 o'clock. It made the install easier, but I'm concerned about things loosening up. I'll have to check periodically to make sure the horn doesn't loosen and fall off. Anybody had that happen?

And I did test it inside a closed garage. My hearing should return soon...