Sorry about getting back to you late. Iwas on my move to Colorado and just got the computer set up and have had to fight the wife and children for time on it.
I have used green quills for the body but have found on ultra picky fish the dark olive to be much more effective. Pick one up some time a stripped peacock herl will sometimes be a better match.
Also forgot to mention, with BWOs there really is'nt a spinner fall. the females move to shoreline vegetation that leads into the water and crawl down to deposit there eggs. So for their spinners a little olive soft hackle is killer.
Have a Good 'Urn,