Maurizio,
Looks good. One thing I noticied and I don't know if MAB said this or not, but the right foot should probably be more directly under the head in this pose. That would also cause the right hip to shift outward. Most of his weight is on that right leg and it would logically fall directly under his center of gravity. Please keep us posted on your progress on this one. I love Cossacks!
Matt S.