Originally Posted by LowPost42

I'm currently investigating something, and is the reason why I asked.

I re-headed a shaft for a fellow, and he started fighting a slice. I mean a wild, wicked slice. The more he stepped on it, the worse the slice became. When he backed off, he hit some straight balls. Oddly enough, the shaft was playing weaker in the new head (due to an increased BBGM).

I put a new driver out into play. I was slicing it a little bit. When I eased off, it sliced a LOT.

Now, what do I think I was seeing here? I think I was seeing the effect of having the wrong flex shaft. My buddy needed it stiffer, and slowed his swing to sort it out, while I needed something a little softer. By having something too stout for me, I had to really go after it in an attempt to keep it straight.

Now, which way is it for you? I can't say for certain. Since you were swinging easy, I'd swinging faster. Not harder, just faster. See what happens. Change flex accordingly.