Bob's Comments On This pattern:
The original pattern calls for a medium blue saddle hackle to be used as the inner pair, but not having a decent medium blue, I chose to substitute a blue dun hackle. I liked the results. I'm also very partial to patterns which use silver or golden badger saddle hackles for wings, particularly those with a dark "V" shape along the stem. It's very fishy looking.
To build up and taper the body, I used a cream-colored dubbing as an underbody. It was much quicker than using floss only, and doesn't seem to effect its sink rate when fished.