Byron,
What you tied is in essence a heavier version of the F-Fly. A wonderful and effective pattern, but after one or two fish will be too slimed up, CDC structure collapsed, and fly retired to be fully dried.
I prefer the deer hair and CDC combination of the CDC&Elk for reasons of complementary strengths - deer hair for floatability, CDC for movement - and for the ability to take fish after fish after fish.
Cheers,
Hans W