I have a California Air Tools model 8010. Recently it started leaking air out of the regulator and would not hold pressure, as it started leaking after the compressor turned off. I replaced the entire regulator assembly, with on/off switch etc. it is still doing the same thing with the air leaking out of the same exact part/place. Seems hard to imagine the odds on that. I am not much of a mechanic. Any ideas from those with better skills than I have?