My experience with the SF Flash Blend is kinda different.
I think that the fly looks great, and I have tied them similar with the saddle inside the FB, but my experience FISHING the fly is that the materials don't work well together.
I have tried to mix in saddles, bunny strips, bucktail and other synthetics, and the results have been less than stellar (to my eye when the fly is in the water).
What is very impressive to me, are the flies that I have tied with just FB. They look great outa the water, but more importantly in the water. The flies that I have tied mixing materials may work just fine, but I have no confidence in them, therefor I don't fish them and have tossed them.
The flies that I have tied with just FB (multi colored and single colored) have caught many trout, LMB, SMB, Northerns, 3 Muskies, one land locked Striper, one Key's Bonefish, a ton of Bahamian Bonefish and one adult plus a dozen or so juvenile Tarpon.
The stuff is a great material, but the way that I have used it, FB doesn't mix well with other materials for me.