Thanks for the extra pictures. I certainly wish I had a plant of this quality to work on.
I would wish that the branches on the tail . . .
a. had a BIT more movement, and
b. could be pulled in closer to the trunk (when they stick out that far it gives a slight fishbone look).
I'd also do away with (or significantly shorten) the deadwood at the bottom of the tail. It dosn't look "real" to me and I feel that in "real life" dead branches that were this thin would have snapped off under the conditions that created them.
All that said -- and agreeing with Vance's comments -- this is a very nice tree. Wish it were mine.