I am curious if anyone has any pointers for how to improve boat speed downwind (in light air). As an example I typically lose 5-10 boat lengths on even a short course, and there doesn't seem to be any real difference in my sail trim / body position as compared to other competitors. Note: This is even in flat water where catching waves is not really an issue. I recently bought a new sail so that isn't the problem. I am starting to think that the hull itself is what is slow - but I have checked and it is dry every time I check.