I used a piece of galvanized metal that is used for chain link fencing. I bent it to make a mount for the servo motor which is used to depress the air horn piston. Hose clamps were used to hold the mount and to mount the horn/servo to the car. I will post video when I get it up. I plan on mounting my wireless video camera to it and running it from my car and recording the whole thing "first person" style.