They are a good shaft. The Tri-Spec and Dynamic Golf have different playing characteristics. The Tri-Spec are designed to get the ball up and DG are designed to lower ball flight. 

Nice.  That's my golf store of choice.  Looks like I know when I will be buying a 910.

Can you provide some details on the fitting process?  Will a wide variety of shafts be included?  Is the fitting process free as long as I buy a driver?  Can I bring in…