Thanks for speaking up on the scba valve thing. Having looked at the underside of a scba valve stem, many years ago, the wall looked very thin and the reduction in metal seemed in a word - catastrophic. I said before i believe folks simply needed to know a bit more than what was being said. I understand and respect your answers.
Playing devils advocate here something for users to think about -
Following the ISO specs is great and the valve may indeed be safe but was the performed work legal, was the work done in a legal DOT/OSHA approved fashion?
IF someone was hurt/killed with a modified valve would the user of the valve be guilty of negligence?
This isn't a personal attack or anything like that, i've shot with you in AZ and consider you a friend. I don't have a business selling scba tanks or valves and have never been a shill for any company. Safety is simply safety. Liability is just a fact of life.