Securing a Co2 tank for OBA

[alpinhi]

Anyone here use Co2 to air up? If so how do you secure and transport your tank? I have a 20 lb tank that I could secure to roof rack but I really don't want that extra weight up top. The rack already has my spare tire and a Rotopax 4 gallon fuel can up there.
Thanks
Travis

 

[CXS]

I have mine mounted in the back of my Limited. Just drilled holes through the shelf for the bracket.

 

[gm350reratliff]

I have a rubber quick fist mount secured through the fender well storage cubby. Yeah, it's only secured to plastic but I also have a couple other thick bungee cords holding it upright. So far, it hasn't moved.