Hi Clive You are most certainly correct. The world is full of arrogant persons who know of past mistakes, but nevertheless make the assumption in their infinite wisdom that they have the necessary intellect or drive to make it work. That is not to say that failures of the past cannot be rectified within the same process. What it requires is a good solid dose of common sense. However that was not the point I was attempting to make, what I was alluding to is that, even if you have the common sense and you are not aware of our past mistakes there is a large probability that you will make those same mistakes. Have a great weekend everyone.