Rich you might want to watch this video, not encouraging.
So I went to fill up my Challenger today and it would not go over 400 PSI. At first I thought it was the gun or the fill probe but it turns out to be the umarex compressor. They're sending me a FedEx return label and want me to ship it back to them. It has less than an hour and a half total time on it
all these compressors seem like a crapshoot nowadays , Maybe shoebox will eventually come back and start making 600 dollar units again/