Simply amazing how fast things seem to change; back in the 70/80's pattern guru Don Lowe wrote a feature in one of his "Flying LOWE" columns for R.C.M. and discussed 'adverse' and pro-verse roll coupling and the simple yet scary fix of cutting partially through the (one piece wing's) center section and increasing or decreasing dihedral dependent on adverse or pro-verse yaw,expert advice for a time before computer mixing became available;what I question is "how much" do we fix in regard to airframe alignment opposed to a 'mix' for every trim problem.. then again in this case it doesn't translate as easily for a typical two piece wing, using a wing tube as is the norm now. AHHHHHHthe good ole days or were they?