VL, I have read that over a few times, it is simplistic but doesn't cause me any great shock. I agree, use the operators techniques, if you don't, you won't last long in the company. The problem with deviation from manufacturers advice comes after an accident/incident. If your company is using different profiles, that is their get out of jail free card.
Have you considered actually feeding back data to the makers? You never know, they might change the advice given
