Amazing work, mate.
I´m trying something similar.
Completely engineered it in a 3D CAD System. moves realistically and...wish me luck...maybe I can produce it the corporation I´m working.
Shouldn´t be too hard...
You can check it under my created threads if you like...
Thanks EndoSickness,I checked out your Drawings and they are awsome you truly have talent,can't wait to see your take on the arm.