make a durable air chuck with a gauge!
I have this one:
http://buy1.snapon.com/catalog/item.asp?P65=&tool=all&item_ID=12316&group_ID=1665&store=snapon-store&dir=catalog
which the next time the Snap-On guy shows up is gonna be getting a new freaking gauge, AGAIN! If it takes a mild tap or you drop it from like 2 foot, the needle jumps and thats that, it is innacurrate from there on. I bumped it against my tool cart today, bam 10 psi off now. Pisses me off most because my Snap-On guy sucks and it took him 3 weeks to get my replacement gauge that last time this happened. I'd gladly trade it for the Matco version of the samething, but I'm certain its the same damn item.
It should come in a kit with a couple of interchangable ends and a quick coupler. I modified mine with a female coupler from our air lines. Then just throw a few fittings on some air chucks.