This fly convinced a few fish for me yesterday, after they had refused a Puterbaugh caddis. I tied a few of these last week after seeing your posting and had them in my box. Thanks for posting it!
It was one of those days when changing flies often actually paid off. I started out with BWO nymphs, then to caddis pupa, then golden stoneflies, and finally to caddis dries, with fish on each different fly.
Ted