Hey Gonzo, this question's for you, but I hope others will join in once the discussion gets underway. Renee Harrop has a photo of an emerging baetis (I first saw it in a Flyfisherman article, and think the photo shows up in at least one of his books. The fly shows short split wings just unfolding, and a long, carrot shaped shuck. The baetis and paralep (blue quill) emergers in your book have virtually the same silhouette, and a very recent modification of my version of the old Little Lehigh Flyshop baetis emerger also does. For the shuck I use long CDC strands, snip a few strands short on the bottom for legs, and tie a thread knot around the long strands near the end and add a minute drop of super glue to the knot. Then I snip out a few strands in the tail, just like your shuck (I also use a glued thread knot on your fly--heresy, I know but my fingers are too clumsy to do it the other way).
The question is, do you use your baetis and blue quill pattern for any of the larger mayflies, such as Hendricksons (E. subvaria)or do you prefer the emerger tied on the swimming nymph hook for these larger flies--and if so, why? I'm also interested in your thoughts on my Little Lehigh pattern, which I'll show you at some point to see if improvements can be made. I know you're not a big fan of CDC, but this fly has taken some big browns for me, so it'll be difficult, if not impossible to break my addiction to it. I'm wondering about using poly yarn or another synthetic for the clump wing, though, and/or possibly switching to an antron or zelon shuck. One thing I learned about your emerger this spring is that it is tough as nails. My CDC shucks may not prove to be, especially now with the bound fibers that can't so easily slip though a brown's teeth.
Time and testing will tell on some of these issues, but other folks may find them interesting for now, so I'm posting this up.
"He spread them a yard and a half. 'And every one that got away is this big.'"
--Fred Chappell