I currently play a 913D2 with a Stiff Whiteboard. As with my previous driver I seem to constantly fight the slice. My swing speed says stiff (108-115) and there are times that I crush the ball straight but more often than not I hit a slice. The times I hit it straight lead me to believe that its my mechanics so I've tried almost everything from ball placement in my stance, strengthening my grip, moving my lead foot a little more closed, etc. I also have a tendency at times to allow my right arm to leave my body causing a "chicken wing" which will also cause a slice, but even when I consciously put all these "anti-slice" mechanics in place I still have a tendency to slice. After searching online for any help I can find I've read that it may possibly be due to my shaft being too stiff which in turn will prevent the club head from squaring itself up at contact. I play a regular flex in my 3 wood and hit it pretty consistently so I'm now thinking maybe my driver should be fitted the same. I believe theres a possibility that my high swing speed may be due to , like most golfers I think, wanting to hit the drive as far as I can and maybe swinging too hard which could be hurting more than it is helping. This could also be the reason for my erratic driving because I believe it may be throwing my tempo off. I treat my 3 wood as more of a precision club and tend to swing a bit slower and as a result I find I hit it quite well the majority of the time. I'm thinking that I will give a regular flex shaft a try but this leads me to another issue. I have a naturally high ball flight on my drives and to combat this I've gone to a 9.5 from my previous 10.5 and also went with a heavier shaft (63g to 72g). I've been looking online and find that they aren't a lot of heavier shafts offered in a regular flex. The only one I've found so far was the Oban Devotion 7. Any insight into the curse of my slice would be greatly appreciated.