Nice looking bunch-a-flies.
I really struggled with this swap. Nothing I did made me happy. I was gonna try a Greenwell's Glory but as simple as the body is, I could never get the wings right and I had a hard time finding decent Furnace hackle for the beard. When I finally got some hackle I liked I decided I hate beards. So I tried a full hackled version (which from my reading is OK) but I could never get the wings to sit right so I ended up with a bunch of greenwell's body soft hackles.
So I went with my first choice of the Dark Cahill and still I found I don't like beards so I went with the full hackle version.
I took some pictures and showed them to a friend that has been tying for about 30 years and he said that they were OK but the head is too big, the hackle too long, and not enough wing, the result is the wing get's lost in the hackle.
This is what I was going for,
Still, I think they will fish well.