Sorry man, did not see your post...
I really do not tie the fly on anything smaller than 6 or 8 because the spey hackles are a bit hard to find and to work with in the smaller sizes. Like I said, the Picasse was originally tied to be a big fly.
What is really cool about the fly is that you can use any color wing you want without changing the body mats or spey hackle. This offers you the ability to have several different color Picasse's!
Will respond to your email soon, however, you know when you fish with me this summer that your boxes will most likely stay shut!! LOL! We will most likely use my flies.
Best to you and Anneke!
Independent Salmon & Trout guide