Overall a nice job.
However, to my eye the G.P. tippet tail veiling is too long. I prefer mine to be not more than 1/2 the length of the tail, and usually prefer them to be 1/3 tail length on my own flies. Also, I prefer to make the tip of tinsel alone and then make the rear 1/4 to 1/2 body out of floss because to my eye these make for a more ballanced fly.
Great colors, just the right amount of hackle, and excellent winging. Keep up the good work.