RE: Roll coupling?
Hey Todd, a mix will remove the "bad" tendencies during all stages of flight and this is a positive attribute. The only difference as Doug pointed out is that the degree of compensation will usually increase with increased airspeed. Perhaps you could also mix the percantage of correction to your throttle. (I don't know if this possible with your 9C or 9Z off the top of my head since I am a "program by the book" kind of guy.) Also this may bite you if you get into a problem on knife edge and back off the power, then you will be left with less mix to compensate for those negative tendancies at what is likely to be a high speed.
Perhaps you can get Tony to give you some tips.
Antony