I'm curious as to why the stock shaft for the D+ is the 72 gram shaft as opposed to the 62 gram shaft? I know you can get the 62 gram shaft at no upcharge...but will the weight be adjusted to provide the same swingweight at standard lenght of 45"? What if I were to customize the length to 45.5" with the D+62 shaft? Again, would the weight be adjusted to swingweight the same as the D+72 gram shaft at standard length?