Well, got some more pics and video of the air speed as requested.
Here is where I decided to run the gauge lines into the cab
Here is close up of the valves and wiring. Still need to clean up the gray wires.
And proof that my system holds air!
And finally a video of the rear end dropping. I had to set the camera on the tire, so the view is a little weird, but you get an idea of the speed.