At first I did the dummy check ... is it really only 50 psi? I use the air hose and point it at your face

... yep 50 psi! Regulator checks sat!
I went ahead and ordered a check valve for the input port just in case, but the way I understand it ... if the check valve was inoperable it would direct the pressure to the relief switch and it would shut down, right??
There is no air that I can feel coming outa the port either .... the saga continues.
Thanks for commenting Greg...