Lately, I've been slicing my driver on most swings. On my woods it's more of a power-fade, and on my long irons it's just a slight fade. On my short irons and wedges I have a straight ball flight. I had a lesson about a month ago and he looked at my swing and told me that I was consistently on-plane. My ball flight with my driver has gone through patterns since I starting seriously golfing in April. It started with a slice. Afterwards it started going the other way going to a fade, then straight, then a draw, then hooking pretty bad and the last two months it has started going the opposite direction to a draw, straight, fade, power fade, and now I'm slicing again. My theory is that since April my swing speed has gradually increased and I am "outgrowing" the regular flex shafts. Lately with my driver my clubhead seems like it is "lagging" further behind my hands than it used to which I think means that the shaft I use is too soft of a flex. Should I consider trying something with a stiffer shaft?