As requested. Whats going on? Can this be upgraded with a better needle valve? Sorry, I should have put the camera on macro but it is good enough for demonstration purposes. What do you think Anthony?
How about rotate the regulator to this position:
you can take out the NPT to air hose connector, connect a solenoid to the so call "needle valve", then a real usable needle valve or metering valve to the solenoid.
to find the right parts for our co2 system is a big task, not anything call a "regulator", "needle valve" or "solenoid" and you assume they would get the job done.