Blade we´re not talking about the shoulder "joint", only, but about the WHOLE shoulder to move as on the 600.
Means: the shoulder in 360° + the pistons MUST move and they´re there. So should be no problem.
Did you see the shoulder on the 600?!
You own one, don´t you?!
Just a general question, since I don´t know your collection.
Made a manip with paint, very crude, hope it helps to understand and shows that there are the tools to make a realistic moving shoulder on the 800 too and where the ball join ACTUALLY should be...
So you mean for all of the joints in that area to work together to make it move 360 degrees? I see.