Under wing tied in first
Shorter fibres first stacked like a sandwhich,the old books seem to list these fibres first.
Then I add colour and natural fibres again in a stack, I tend to do 6-8 fibres natural
mount wing in if fibres get out of place no worries fish don’t care .
tie in sides or shoulders a long with horns or mallard if called for. Bring thread to front of head, push head cement into open fibres, add head cement or liquid wax, allowing it to tack up
apply a wool noodle, wrap to back to wing . Whip it and fish it 👌👍.
Hope this helps