Hans & Alan,
Don't get me wrong guys. I don't particularly like counter wrap(winding) a ribbing. I was under the impression that Hans used that method when the body was wound with a material that needed protection. Completely agree that a slightly different angle of the rib (what I believe you're calling 'pitch') offers even better protection and looks much better. Sometimes, not often, wrapping the material to the bend, securing it with the rib material and then wrapping it forward works too.
Anyway, I like that fly with the rib as is.
cheers.
Allan