I believe we have thoroughly hijacked Gordon's thread, but ...
For anyone interested in following up on the YouTube video from RVGeeks, here are the necessary parts for the complete assembly, including the ball valve for activating the engine compressor. I'm assembling mine today but didn't include a photo of the finished product since you can view that on Part 2 of the video. Cost was a bit less than $40 for the Kobalt parts shown, but that doesn't include any tax you may have in your state nor the 2 male quick connects I already had on hand on my hose and existing inflation chuck/guage - about $3 each - nor the cost of the chuck if you need it or the teflon sealing tape which most of us already have. If David is correct, the tilt-lock chuck at Les Schwab's will be another $8-$10; my local store had to order some in. So depending on what parts you already may have, figure around $50.
The male quick connects come in more than one type, automotive and industrial, and perhaps others. Since my particular port on the coach takes automotive, with the wide-flanged tip, that's what I had onhand and used here. Supposedly the female Kobalt quick connects here are "universal" and will fit both main types, though I haven't yet tried in them the one industrial, narrow-flanged one I have. Just be aware that there are different quick connects available, and if you have yet to put together at least a hose, it will have to have a male connector that fits your particular port. Chances are it is the automotive type.
Click on the photo to enlarge for part numbers.
-Joel