Stop being crazy... sell your driver to a crazy dude. Buy a yamaha D460 or D445 depending on your strike... stock shaft will be more than enough for your swing speed. You need to crush a head to make it sound and feel good... once the stock gets too easy THEN invest in a shaft. If you really need to show some flash... once you increase your speed and technique a bit, GD EV 5 reg/stiff OR md 6 SR flex will give your speed amazing results!