building a car camera rig (mount) of whatever its called

[carsightings]

i really want to make a good camera rig.

I found this on google:



it looks good to me. i think its connected to the cars chassis with a strong magnet.

i want to build a rig like that and i need all the help and tips i can get.

btw, i made this:

its a basic layout to the rig i want to build.