Tab linkage

Originally I thought the boost linkage should be set so the tabs would always be parallel to the air stream. The horns are at center of the hinge line and the linkage is in equal holes, which makes the tab always parallel to the airflow over the wing.

Tab parallel to airflow
The tabs seem marginally effective.

The tabs seem to be more effective when the rear of tab pinches towards the wing with aileron in the up position. – unequal holes – front in #4 hole and rear in #3 hole
The ailerons seem to be more effective but some twitchiness has developed. However it was windy today.

Has anyone verified where the tab linkage is most effective?

Bill