Curious about Stock Shaft Choices for 913 Drivers?

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?

The +D is a firmer tipped shaft and most players use the 72 gram vs the 62 gram version although as you noted, we do offer both at no upcharge.  Swingweights are not adjusted unless specified.  If you order the +D 62 at 45.5 with a standard grip, we would build to D5 swingweight.  You can have it built to D3 swingweight if you specify that on your order. 

So the standard swingweight for the 913 drivers is D3?  If I went with the 72 D+ at standard length, or the 62 D+ at standard length, each/either would be built to D3 swingweight as standard?

The +D72 would be built at D4 with standard length and grip and the +D62 would be built at D3 with standard length and grip