I went to a demo day this past weekend and hit the entire 910 lineup. I love all of them. The rep didn't have a stiff Kai'li for a driver, but he did for the fairway woods and hybrids. I hit this shaft great. He did have a Fujukira Motore F3 60 stiff that i loved in the driver. What is the difference between the two? I am not sure what to order since i couldn't hit every combination.