You know Chewy, it sounds like this guy is one of those people who, for whatever reason, once they get hold of the stick, Never. Let. Go. If its the wrong end, doesn't matter, they will not let go.

I liken them to a PROM, Programmable Read Only Memory chip. There are versions of these that you can re-program, but these people seem to have been equipped with the cheap, once only kind.

Having worked with someone who would not change a way of working that *I* taught him, ( the change was because of a special case ) I have given up on such people, if they don't get it, that's it, I tried.

Good on you for your effort, but let it go.