Macca, Are you saying that on a boat with lots of apparant wind, that there is no slot effect from the Spinny over the main and one would be better utilising the lift from the spinny to get the bows out more ( less drag )

There are other ways of getting lee helm or weather helm out of a boat as well such as simply moving the rig more upright or back ( or even moving the base from its usual position on the crossbeam, or simply balancing the rudders themselves better by altering their angle of incidence slightly.

Forget the M20 Macca and lets talk F18 A Class type of knowledge which are much more compariable to the F16's