That looks like a lot more work than is necessary. I tie them on the feather like Davy does in this video: Knotting Pheasant Tail Legs: http://youtu.be/6S9FVDoRjwk
He likes the buggy single fiber legs, but I usually tie 3-5 fibers and always tie both knots to get the right shape. You can kind of get in a zone with this and knockout a full feather in 20-30 minutes.
Mike.