[rheavn]

The air leak job is complete!!!  Thanks to all the thread contributors who gave me fresh ideas as I moved along.  

The final air leak ended up being a loose fitting on the back of the emergency brake valve under the dashboard.  I was able to hear the leak using my ultra sonic leak detector.  

My entire air system is now air tight for the first time since I've owned the coach.  All "push in fittings" have been replaced.

The seat was found to be air tight, but I found two "push in fittings" that were replaced, so thanks for that suggestion.

In the past I have never gone about finding air leaks in an organized manner.  This time, by doing the system schematics, I was able to break the system into three separate systems.  This allowed me to find leaks or eliminate parts of each system part by part in an organized manner.  As I moved from the back of the coach forward I knew I was leaving no leaks behind.  

In case you plan on paying someone to find your air leaks, this project took me fifteen days.  The bonus was I learned a lot that I will not forget and have a better understanding of the air system.  I also have a complete set of schematics and complete documentation of what I did.  It will be an easier process in the future.