Interesting responses--thanks so much. I am a directions reader so do open the air release after each use.
I've checked out several of the regulators online and I'm wondering if a similar plastic model for a Black and Decker or DeWalt would have the same inside parts. That would be better than trying to rebuild the manifold which I could see doing with some pipe tees etc. Everything screws into this manifold except the regulator which is built into the manifold.
I have a larger Harbor Freight compressor which is one reason I have not used the smaller one very often. I really don't want to trash this one--it is practically brand new.
This is kind of a rant too regarding the lack of individual inside parts for this regulator. Since the regulator itself is not replaceable. Would be a pretty inexpensive kit and obviously they break often. In the meantime I CAN use the compressor with the plugged stem piece. Just don't feel like I can rely on it in the field especially.