Hroachen, we're all finding the same thing that you did. I started with my UCD at 5"CG, and set up the mix so that it would knife edge straight, problem solved for the most part. I then moved my CG back to 6", and I had to substantially reduce the pitch mix. On right rudder input, it went from 14% to 8% from what I remember. So if you experiment to find a CG you're comfortable with, the mix may change a little.