Tuning FX Crown mk1 regulator adjustment

Remove the bottle and degas the gun. When you have zero on the pressure gauge turn the reg adjusting screw all the way in gently, then back it out about 1-2 turns. Reinstall the bottle. Now adjust the screw out slowly until you get the pressure you want.

Same for the MKII? Also, does the bottle need to be depressurized before removal? I'm new to this so sorry if these are stupid questions.