This was a real fun MOC to make, I haven't really used green all that much. I'm happy to have gotten the shaping I wanted, especially since the torso was a pain to make, at times.
The stability isn't really a problem either, the feet each almost act like tri-pods. The weight is more forward, but the natural way for the feet to fall is in the opposite direction. So I can move it's arms and it isn't likely to fall.