Hi John! Thanks for the kind reply... Yes, I understand it's discontinued and suspected it was for intermediate fliers.
I'm sorry, what does 'channeling' means? Do you mean tracks straighter? How would that looseness affect fades and back tricks in general? It seems the foil of the sail would change a great deal depending whether it's facing you or facing away like in some back tricks, fade, etc.
Do you have any new dual line design coming out soon?