Re: casting weight
I agree that the oval cast or constant tension cast is a good one because it avoids a tailing loop and minimizes the possibility of hitting the fly rod with the fly or shot.
I would also recommend the the water tension cast. Allow the line to go down stream and the friction of the line on the water and the weight in the water to load the rod for the forward cast.
"Discovery consists of seeing what everybody has seen and thinking what nobody has thought"..........Szent-Gyorgy