I wouldn't try to go too low on the rates, the controls won't be effective, and you may have difficulty finding the rates switch to select high rates. Once you find high rates, you may find that difficult to control. I would go with the book setup for low rates. It should give you adequate control throws for normal flight. I don't use rudder / aileron mixing on any of my planes. For most of them, it is not necessary. You may want to experiment with it in the future on something, but not with this plane. Try not to make this too complicated, and you will have fun. It is almost as nerve wracking to try and help someone 8000 miles away as it is if you were here at my field.