You may want to consider this. Holley adjustable pressure regulator along with a mechanical gauge. This pic borrowed.
I went this method but used a sensor in the schrader port for an electric gauge mounted remotely where I could see it. The Holley regulator made it adjustable.
"Kilgore Trout once wrote a short story which was a dialogue between two pieces of yeast. They were discussing the possible purposes of life as they ate sugar and suffocated in their own excrement. Because of their limited intelligence, they never came close to guessing that they were making champagne." - Kurt Vonnegut