Boulderjohn, please pm me on your "bad" repair guy. ( I believe I know of him. )
I thought I would follow up on this publicly.
Just as a reminder, I wrote of a case in which it became clear to me that they guy our shop had been using (the owner of another shop) to service my regulators was simply checking to make sure it was working OK as is (maybe) and then returning it without doing any actual servicing. When the shop saw enough evidence to convince them that it was happening more than occasionally, they dropped him completely.
Seeing that description, Beaverdivers asked for more information, and in our exchange it turned out he did indeed know exactly whom I was talking about. In the time since my experience with him, he no longer owns that shop, but he still works part time "servicing" regulators. It seems a lot of people have figured out his scam, but a lot of people haven't. A couple of years ago, someone recommended him for regulator servicing in the Rocky Mountain Region forum. I wrote a carefully-worded PM suggesting that there might be issues with his servicing.
Why no public warning?
Well, how can I prove it? I have very strong suspicions, but that is as far as I can go. In my case, it I say that Mares said that the regulator had not been serviced in years when it had in fact been sent in for service only a month before, he could counter that it was just Mares' opinion, and they could be covering their butts. I am afraid that I could be sued for libel if I make public charges that I cannot back up. And so he goes on as always.
It happens in a lot of other businesses as well. I made the mistake of buying a Dodge once, and I did all the required maintenance. My brother-in-law did the same with a Plymouth (another Chrysler). In both cases, we found out after a while that although we took our cars into the dealers for servicing and had the papers to prove it, almost nothing had actually been done. Chrysler shrugged off both cases. We couldn't prove it in either case, and even if we could, that was between us and the dealer. They couldn't (or, more accurately, wouldn't) control the quality of work at their dealers' service centers.
After many such cases, our state made a law requiring replaced auto parts be shown to the customer. They know that it is too easy to commit a fraud when the customer has no ability to see what has actually happened.
I am sure that every single person participating in this thread is 100% honest and would never do something like this, but I think it would be a good idea for such people to follow the example of the laws in the auto repair industry and give back the parts. I don't care what the law is.
If I were doing regulator servicing for hire, I would return the parts.