I came back to the game this year after several years of being an occasional hacker. I'm really working hard on my game and am making fast progress. I began the season with my old Taylor Made Burner 9.5* S90 Plus Bubble Shaft (stiff flex). In the beginning I couldn't hit it worth a flip and decided to pull the trigger on a more modern driver. Wound up with a Tour Edge Bazooka JMax QL 10.5* Regular Flex. At first it made a big difference. I hit it longer and straighter than my old Burner. Now that my swing is improving I'm hitting all my clubs a whole lot better (they're all stiff shaft except that Bazooka driver). The one exception is I started slicing with my new driver. Not all that bad but it was getting harder and harder to control. Just for giggles and grins I broke out my old Burner and, lo and behold, I'm hitting that thing really good now. Much longer, straighter and more consistent than I ever hit it before. What's more I can actually hit that driver longer than the Bazooka. I haven't had my swing speed measured but I wouldn't think it's high enough for 1* of loft to make that much difference. I'd be surprised if it was more than 100 mph. The Burner's lighter than the Bazooka (smaller head, less wind resistance). Plus, I'm guessing the regular flex shaft tends to exaggerate whatever swing flaws I do have. So, what do you guys think? Any other theories?