RE: Knife Edge Pitching
For mixes to correct for pitch or roll couple, I leave them on all of the time. My theory is that a model couples all of the time so some mix is needed. Reality is that they dont couple to the same degree all the time, its effected by attitude, speed, CG, etc, however its normally close enough not to create a problem. If a model needs a mix that is so extreme that it causes significant problems in other attituds the model probably has bigger problems.
I havent seen a Magic for a while. Never had one, but I always loved the Curare which was Prettner's model prior. Normally when a pattern model shows asymmetric pitch couple I look for a warp in the stab, or an elevator set lower than the other.
When you say going from left to right I dont know which side its on, so lets assume its a right roll into KE so top rudder is left. If its pitching toward the belly, look at the right hand elevator and see if its low (or that stab half warped so the TE is low toward the tip). You might try adjusting the right elevator neutral up a little and see what you get. Its alway a trade off though, so it will start to effect loop tracking as well. If its the other side that has the pitch, do thesame to the left elevator. Experiment and see what happens.
Mike