Rancho 9000 remote controls

[C Schomer]

I have 9000s with the adjustment knobs and want to convert them to remote control. I want to build a compressor system to serve my airbags and the shocks. The Rancho remote system uses a gauge that is marked in the five positions but not in psi. Does anyone know what the actual psi is for each position? I've heard the shocks take up to 250 psi. I've never had to go above #3 on the knob when loaded and down to #1 when empty. If I knew those pressures, the rest would be simple. TIA! Craig