"Mike Connor" wrote in
:

It is quite simple to do really. I use my thumbnail. After you have
tied the hackle in, ( it works with any hackle), grasp the feathers
between your thumb and forefinger, with your thumbnail at the base of
the fibres, ( or at the point from which you wish the fibres to bend),
and draw them between your forefinger, and over your thumbnail. This
gives them a pronounced curve, which will remain that way, even after
use. How they curve, and how much they curve, depends on the pressure
you apply with your nail.


Great tip thanks Mike.

Steve