JTP - I don't this the tech is being honest about what work he's done. Verbally, he told me he replaced the diaphragm in the valve. On the invoice, which I haven't paid, he said that the gas company needs to reduce pressure at the meter to 3.5" w.c. (dangerous advice).
I've escalated this to the manufacturer and am trying to convince them to involve the Dealer Metrics Specialist. If that doesn't bear fruit, then I'll pay a different, authorized service company to come out and fix it. Bottom line, I want it to be safe. At this point, there's a good chance the current tech has Frankenstien'd it.