Troubleshooting help needed-AC pressures

1...Assemble system including initial oil charge
2...Pressure check using nitrogen (I actually often use CO2) and allow for temperature changes to judge leakage

When pressure checking, "sweep" system AKA inject test gas into high side with low side port open so that inert test gas "sweeps" most air/ moisture out under pressure.)
3....Evacuate and hold vacuum and re-check for leaks under vacuum It is helpful, if the engine will run, to warm both engine and interior as a warm system being evacuated will evaporate moisture more easily
4....If pass---charge system