Intersting thanks.

You know as I use a 1/64 scale Im matching the line on the scale so its closer than the assumption of the accuracy of the scale.

I guess the point of my previous question was, doing multiple rolls (or half rolls) to the right the heading goes left, so reducing the down aileron throw reduces the heading change to the left. Am I understanding that to be the solution as Jim W. explains?

(My testing seems to validate this explanation but I was just interested in hearing this confirmed.)