I'm still trying to figure out what i really think about this one! He is definitely not without flaws... but in every mode he just looks so brilliant, i'm finding myself be more forgiving than i would normally because of it.

My one stands up fine as well, are you sure you have the ankle joint clicked all the way back? Since the feet are basically the only pieces of metal, he's weighted quite nicely and can even pull some single-leg poses.