Well the placement is good and has always been good for as far as I remember.. What this sig does (all my opinion so if I talk nonsense ignore me) is nullify your good background by putting a stock on it which colours are almost the opposite of the bg. What you could try to do, and I'm not saying it'll work but it might, is put the stock's saturation to 0 (making it grey) and putting it under the color balance layer. Then you could add highlights by using the dodge/burn tool; you could also try duplicating the stock and messing with the blending modes. I hope I've helped...if only a little.