If you build that little pillow before laying the hackles on top of the shank you should be able to stack them, one or two wraps for each just to keep them ready and then pinch the back end of the pillow with your off hand and really wrap the whole assembled wing tight. I also leave about 1/2 of the hackle stem bare in front of the pillow so I can lash that tight to the shank. Gives some more support for keeping things in line.
One of those 'touch' things like tieing off bucktail so it doesn't splay out too much.......
I think joe might be at Wilmington, you can get some time with him there.