Over the weekend at Uwharrie, some Jeepers next to us showed me a neat toy. It was an ARB deflator, he said it was 40 bucks at a 4x4 shop in colorado. The way it works was like a normal chuck with a gage. It clipped onto the vavle stem, and had an adjustment screw that actually pulled the valve core out without the risk of losing the core!! Very cool and it monitored pressure in real time. I have a set of trailhead deflators and a set of smittybilt deflators, which work pretty good, but those tractor stems look awesome!!!