I think this is definitely a step closer. I think the hands just need to appear to have more purpose to their action. One way to do that is to make it look like the fingers of the left hand are acting on the outer edge of the muscle. Maybe make the muscle narrower in the area of the left fingers, as if the fingers are pressing on the muscle. The other way to give the idea of the muscle action is by having the lines of the muscle converge more in the area where the hands are touching the muscle. The converging lines currently don't relate enough to the hand position. One more thing: The joint at the tip of the left thumb should be very slightly bent so it is pointing slightly up, not slightly down. Thanks!