Start the 30d Semperfli Nanosilk just behind the eye of the TMC 101, wrap back to about mid-shank, then come forward to about 75%, roughly three eye-lengths back from the eye.
From two Natural CDC feathers, peel a fairly hefty bunch of fibers off the side and bind it in by the butts at that 75-80% point with a narrow band of thread, leaving plenty of room in front. Lift the butts, snip them at an angle, and wrap down over them all the way back to the bend. Leave the tips long; they get cut to length at the end.
Take a skinny Goose Biot from toward the tip of the feather, from the wing that lets you wrap with its natural curve, since the segments nestle together better that way. Hold it dark edge down with the tip reaching the base of the wing, catch it at the bend, and wrap forward over it to leave a smooth, slightly tapered underbody. Put a shot of Zap-A-Gap on the underbody before wrapping.
Wrap the biot forward from the bend in fairly tight turns, overlapping so the dark standing edge of each turn covers the one before, up to just short of the wing base. Tie it off with a couple of firm wraps before releasing the hackle pliers, add a couple more, and trim the butt as close as you can.
Take a somewhat undersized Grizzly Rooster feather and bind it in at the front edge of the biot. Wrap over the stem up to the eye and back again to the base of the wing so the thread hangs in front of the wing.
Divide the CDC in half. Pull the near half toward you and take a couple of turns front to back, then a wrap around the hook; pull the far half back and take a couple of turns back to front, then a wrap or two around the hook. The wings now stick out to the sides.
Put a thin, tight strand of Adams Grey Superfine on the thread, far less than you think. Build the thorax behind the wings, cross under to the front and take a couple of turns up to the eye, then use the last of it to prop the wings back until they sit 90 degrees to the shank. Finish with the thread just behind the eye.
Wrap the hackle through the thorax in spiraling turns, two behind the wing with the inside of the feather facing back and two in front, and tie it off with a couple of turns. Clip the tip.
Sweep the wings back, take a couple of turns, whip finish and clip the thread. Clean any stray hackle fibers off the hook eye.
Trim the CDC wings just beyond the hackle, a little longer than the hackle fibers, and splay them out.