Alternative APU System I saw last night.

[snailexpress]

I have it for almost 4 years now. Working good.
http://rawze.com/forums/showthread.php?tid=1569&page=2
The pictured setup (in post#1) shows example of horrible dangerous craftsmanship or lack of it.
Supporting structure weak and will fail in case anything hit the side fairing.
Freon copper pipe has lot of play and vibration will brake it very soon.
Compressor unit sitting too high on the cab. This will move center of gravity point up and amplify side to side shaking.
No brackets to secure compressor from front-back inertia force.There is only 8 spot weld points hold the compressor unit to the rest of this mess.
Here is how it should be done