So I finally got a larger compressor (yay). The max is 150psi on it. Obviously I don't need 150psi to do air brushing (for one, I like having hands/fingers) The owners manual says nothing about using the regulator beyond turn counter clockwise to lower the pressure, and turn clockwise to increase it. When I use a air/blower tip and hold the trigger down, I then turn the knob counterclockwise, but getting it down to around 30psi for airbrushing ...isn't happening? I got to the point where air started to seep out of the regulator knob area, and when I released the trigger on the air nozzle, the pressure readout on the regulator shot back up a ways. What am I doing wrong, and what is the safest way to go from 90psi, down to 30psi for air-brushing, then back to 90psi for tool use?