Alternative APU System I saw last night.

[Chamberpains]

The securement of the tubing and wires of the OP pics shows that whoever put it together has a great idea on how to make thing LOOK good. But zero clue on how much abuse and vibration that stuff is gonna take.

The rope holding the tubing is gonna cut and break in no time. Snailexpress is right about the the copper tube failing rather quickly. All those fancy looking brackets are gonna tear the fairings apart and rip a hole in the back of the cab after a few good bumps. I forsee this guy being broke down with a tow bill and the cops on scene when it all comes crashing down while he's driving. Snails' set up is much simpler and secure. Less is better when mounting stuff to the back of the cab.