hey guys, I was just watching the tornado finals on TV this afternoon and it was awesome. One of the things i noticed when the guys were sailing downwind with the kite up was that the skipper was playing the mainsheet quite a bit. This was especially clear in the footage of Ashby and Bundock going downwind. This is totally new to me as my focus has always been on the spin and treated the main as a sheet and forget. Can any tornado sailors enlighten me why the play the main so much?

Isn't the main supposed to be on tight so that the mast doesn't break from the strain of the kite? What are the skippers trimming to? the tell tales? Any info would be really appreciated. TIA