I am always surprised at how a flies profile changes when it hits water and current. Those "big" bugs often turn into medium sized ones and the ones that seem about right out of the water usually turn into smaller and thinner than ideal once wet. The swim test is key.

Looks like you have some rhea, ostrich, couple colors of amherst, and grizzly? What is the darker material around the collar with shorter barbs? Can't tell if it's just darker there due to shadow effect or if you have something palmered in there. Looks nice dude. Toss a wing on the top for some added contrast. A strand or two of something flashy on the lateral line would really set it off. I'd hit it and/or cast it.