Mount the TMC 100 in size 14 and start the red 6/0 about a hook eye back on the shank. Keep the wraps touching rather than stacked — a ropey thread only lays a smooth body if you are disciplined about it.
Walk the thread back a little past where the barb would be so the red thread base is showing, then walk it forward again over itself to about the barb; that is the tie-in point for the body.
Pair two nice strands of Peacock Herl facing the same direction, tie them in there, and bind the butts forward in touching wraps, keeping the underbody level and free of bulk — this is a sparse soft hackle, not a spider.
Wrap the peacock forward hand over hand in touching turns to where the thread is waiting, coating the whole body. The first wrap is the most brittle, so ease into it; add another strand if you run short. Tie off and trim.
Prep a light grey grizzly Partridge feather: strip off all the downy under-feather, hold the tip and massage the rest of the fibres rearward to leave a clean tie-in point.
Tie the feather in by the tip, wrap back over it a couple of times, tuck the butt underneath and trim it out. Keep it light — a couple of wraps' worth of fibres only.
Walk the thread up to just behind the eye, pull the stem perpendicular to the shank, stroke the fibres rearward, and take one full turn plus one more up and under, steadying the fibres with a finger so they stay swept back.
Hold the feather in place, lock it with thread wraps up and over the top, trim the excess close, and finish off the small red head.