The problem with culling all the ones with red faces is it could be the best one you have meaning by is's overall qualities, your other sumatras could have way more problems then the sumatra with the red face. If you look at the scale of points in the American Standard of Perfection the most points you can lose is the shape of the head and the tail. you can not knock down a bird with only one little problem.
No one can make a perfect bird no matter how hard you try.
