ummmmm.................. you can get 5000psi nowOriginally posted by Jones the Paint Magnet
Nitro (or just compressed air which is mostly nitrogen anyway), is becoming more popular at sites as more people are using it now, although not everyone fills to the highest pressure possible (4500 psi).
The advantage with using a pre-set screw in is that you can pretty much chop and change with the automag depending on what's available on site - although you might want to keep an eye on the seals and rings - keep a set for air, another for co2 and swap out the day before.