Onboard air - TANK placement

anybody install an auxiliary tank in conjunction with a compressor? I want some extra air capacity to assist the ARB twin.. but no idea what tank to get and where to put it?
Any help, much appreciated..

 

Yes, I have 2 tandem tanks mounted underneath passenger side frame with an ARB comprerssor

 

I have a 1 gallon in the engine bay where most people mount the ARB twin, I used the XFAKTR mount to put the compressor upfront next to the windshield wiper fluid container.

 

Cool Hardy!!! Hey , can you snap a pic and send?? The Twin comp is mounted under the hood ontop of the airbox.. I am taking him in Monday to get the AIRBAGs installed, and really want to get those tanks in at the same time.. Love to show them the locations....
thank you sooooooooooo much,,.. this is what its all about ( as the ship says no way)

 

I have a 2.5 gallon in the bed mounted to the top of the drivers side wheel well.