I got fit for a 913 D2 Driver at the Jim McClean Center in Fort Worth. It was one of the coolest things I have ever done in golf. They use a trackman for launch angle, spin rate, how far the ball actually carries. They fit me for golf balls. Prov1x. When they fit me for the driver we were using Prov1xs. We tried several different shafts to give me the best launch angle. Working out loft, launch angle and all of the variables that I had never thought of was a very educational. I had always bought everything off the rack. I would not buy another club with out being fit for it.
Have fun. I would recommend talking notes.