Spence -
I figured that would happen when you mentioned the venue. That Flygal is a tough act for a poor relative of Robert Traver's to have to compete with. I won't hold it against you too long for getting led astray.:)
Guys - Check out the third photo on the left of Paul's link
http://www.utahonthefly.com/entomology/BWO/emerging/ (re-inserted here so you won't have to scroll back and forth through the thread). I meant to do this sooner but got distracted. Anyway, it shows the rationale for emergers with looped wings made of mallard flank and also why they should be swept back and split. The shape and look of the shuck too. It's often worth the trouble to imitate these characters at this stage on calmer waters as I've observed the bugs can often get stuck looking like this for quite awhile. Many thanks Paul, for the photo link! I've seen this a lot but still had to dress from memory until now.
BTW - the captions to the photos are a little misleading in a couple areas. First, the immature looks to be a different species. In my experience the nymphs don't darken
that substantially except in the thoracic region. Secondly, the first thing visible where the shuck splits is the mesonotum and pronotum,
not the wings. Even the heads usually spring out before the wings, that are carried low and to the side before starting to spring up and open like an Asian paper fan. A lot of times the very tips of one or both will stay stuck in the case, accentuating the "looped" look.