greatplanes,

I agree with the other posts. However, one thing to remember is before adding any mixing you must fly the plane to see how it reacts. You won't know how much mixing to add until after the first couple of flights. You may find you don't need any.

As for coordinated turns, I haven't flown a 3 channel setup, but I don't think you want to mix rudder and elevator. Most coordinated turns are achieved using the rudder and ailerons.

If you must go it alone, fly the plane with no mixing. It will teach you the proper use the controls.