RAM Handlebar U-Bolt Base for Rails 0.5" to 1" Diameter You can even mount two

You can even mount two GoPro's on the arm

and flick on the switch as you pass people on the track

you can now use any LANC remote that has a 2

The AV-2 features two Line-In/Out channels

and may not be suitable for your activity

RAM Handlebar U-Bolt Base for Rails 0.5" to 1" Diameter You can even mount twoThe RAM motorcycle handlebar base contains a 1" rubber ball designed to sit at right angles to the mounting rail. The rust proof metal u bolt accommodates rails in diameter from 0. 5" to 1" in diameter. Included are black cover caps to be placed over the exposed ends of the u bolt and a composite adapter that can narrow the rail to a minimum width of 0. 5".