So, OK. in the plus column we have:
- We should have winglets because it could potentially make the boat easier to sail.

On the other hand we have established:
- if the boat has some pitch-pole tendency, the races could be more exciting to watch
- winglets might change the tuning or sailing technique of the boat causing teams to have lost a lot of time and energy learning to sail the boat to date
- winglets might induce some other type of issue.

I fail to believe that nobody can safely navigate A-mark on the Nacra 17. It's only that the lifting foil makes your mistake bigger when you push it too hard. I PROMISE you, the winners aren't stuffing it at the top of the course.