Mike, these floating BWO nymphs have long been a favorite of mine and yours is a dandy.
You might consider adding a 1mm thick foam strip wing case that sits under/below the CDC wing on the thorax. I like mine with both the foam and the cdc. I tend to add less cdc and tie it in in a more scruffy style. I try to emulate the wing just beginning to break through the wing case.
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