Walter:
Get your head out of the sand.
Funny, I was going to say the same thing, but thought better of it. I was wrong not to do so. I see that now.
We have facts. Your only fact is that PRC112 was fitted. Out of that you have drawn up a theory. It remains just that. You believe your theory to be true and that everyone else is wrong. Your call, but the last bloke to do so looked rather silly the other day at 6PM, wouldn't you say?