That was very interesting...food for thought...some points I never thought of...

One thing I would like to see discussed is...time....e.i. see a rise and how soon to cast to the area?
Give the fish a chance to reposition...I believe in that and I do cast more upstream but I have never thought of this as a reason..."When you see it, it has already moved downstream some. "

JC,if we see it the instant it happened it must be where it happened...speed of light...are you saying that the fish was stationed more upstream when he sighted the fly...therefore the rise was below his station????....makes sense ...