High guys,
Despite the way it looked from my previous post I happen to agree with you. Ben, Brandon, and as you say Chris it is only a guide. My fly rods are rated by line weight and have very little to do with the fighting power. I am also a fairly experienced rod builder and my rods go through deflection tests etc, so I generally know what I am working with and what is safe for a blank to handle. But with PE ratings varying by so much according to the various brands and a somewhat alien measurement system it could be quite confusing to the less initiated. However the question has been answered, and answered well.