I have a character that has 1 shape key that controls the shape of her thighs (both left and right). What I'd like to do is control this shape key with a driver when either the left or right foot is positioned. In other words, when I move the left foot (IK), the "thighs" shape key is activated. When I move the right foot, the same key is activated. Two bones that activate the same shape key driver. Is this possible?