A Daiichi 1560 size 6, Daiichi 2110 size 10 or Daiichi 1710 size 8 or 6 nymph hook has the perfect shape for this bug.
Crimp the leadshot substitute onto a length of monofil
( best use 0.30mm monofil.)
Tie the leadshot onto the top of the shank, just behind the eye
(the split towards the eye)
Pull the monofilament over the leadshot
Secure with tying thread and varnish.
Cut off a piece of flexibody and taper one side
Tie in a piece of green fluorescent flexibody at the tail.
Make 4 turns with the flexibody to create a nice tag
Tie in the partridge tail feather just in front of the tag
The feather is wound as a collar between tag and body.
Form a dubbing loop and twist on some natural rabbit fur
Wind on the dubbing, secure and whip finish.
The dubbing is then well picked out and the leadheaded grayling bug is ready for use.
The completed fly