Thats almost annoying, I had mine around 50 50 0 and thought it looked good but assumed I had to be more equal on the sliders so pushed more to 40 33 26 or something. What do you mean by local adjustments? just mask off the faces and do seperatley after the initial adjustment?
Yes, I layered Andy's on top of mine at 50% opacity. It's a trick I've seen Dan Margulis do often when each of two versions has desirable properties. Amazing how well it worked this time.