Using CS5 PS and mixer brush was slow on my computer but I was able to achieve the mix.  Also tried some textures on my brush from some of my "knit" files which I had not done before.  Also gained new tips like using "alt" when your painting to sample colors. Also I am now using the F5 key to get to the brush window.  I'm sure I had learned this but never put it into practice!

Here's my first attempt at using the mixer brush.