These clubs now are amazing. If I swing slow and smooth with my driver I will hit it about 280yds with a seeming 40 deg launch angle. Or I can swing my hardest and I get 280yds but with a 7 deg launch angle and a draw. I hear that I need a stiffer shaft because the shaft is to flexible and stays closed and that is why my "strong" shots go just as far. If I get a stiffer shaft I am hoping to get a higher lau angle and therefore more distance. The only problem there is then If I am having a bad day and need to "go back to basics" and swing smooth with the stiffer shaft I will be high slicing it pretty bad as too stiff drivers tend to do. I don't have a swing speed analyzer but I am just curous how fast my hard swing is and how slow my other swing is and acheive the same distance. I am no professional, but I would say some people need to trust there clubs more to hit the ball and stop swinging so hard, and I think they would be VERY surprised how far their balls go. Then after you have the added confidence and control then work up your speed.