Nicely tied. The Orange Heron is my favorite winter/spring fly. I tie and fish it on Alec Jackson #1 1/2's and #3's. Have you ever tried using Orange UNI-Stretch for the body floss? It has the same hot orange coloration of the wings and dubbing you used and is the color that I've seen on flies that Glasso tied.
Regarding Veverka's book, I bought my copy in early January. It has more info in it on materials than Shewey and list all the old spey flies from the 1800's. In my opinion, if a person is interested in spey and dee flies, he should have both Veverka's and Shewey's books.