I had the same problem with the RBZ driver when I tested it at our demo day. I had to get a heavier shaft (13 grams more), but in the same flex. The stock shaft in the drivers are junk, our Taylormade rep at our club told me they cost $18.50 NEW! I also have the 3H RBZ Tour but I hit that straight 85 gram shaft. My advice would be to anyone looking to get the RBZ driver would be to try different shaft combos until you finally get the ball flight you want.