Oh crap, you are right! With the palms facing down, the cavity of the elbow faces inward and downward... crappy crap crap... well spotted, thank you so much!
Yes, as I said, I used the pictures of several dinos to come up with the body. Mostly t-rex and raptor types of dinos. I changed the front legs, obviously, I wanted them stronger, both for walking and for grabbing. But I really liked that kind of shape, it makes it look light and agile. I like it better than a lizard kind of shape. Just my personal taste.
The wings proceed, although my machine seems to be slowing down exponentially the more stuff I add, although I am really being careful to keep the poly count down.
Also I tend to agree with you that the lower part of the back leg is a bit thin. Thanks for the great criticism!