Tyrannosaurus rex latest concept

So I made another Tyrannosaurus rex concept..
I was inspired by Christopher Srnka post over at facebook (thanks Chris) where the debate was about Tyrannosaurus rex lip tissue.
I grabbed my pen and used my older rex model and did some mashup and what not.
This is how I imagine rex that has some sort of lip tissue/skin sheet over the upper row of teeth.
I also gave him a complete overhaul. From the tip of the tail to the nostril.
As for the full lip seal in Tyrannosaurids?!
If they had it, it was an extreme evolutionary disparity(for the lack of a better word)

Model was built in zbrush. Rendered in MR 3ds Max. Comped in Photoshop.

RAAAWRRRR - means Cheers in dinosaur lingo.

PS: There's an additional fun mashup I made. Basal Tyrannosaurus xD.