Went to a range and demoed drivers yesterday and really enjoyed the 913d2. First hit it with a 62g diamana stiff shaft and was hitting it pretty well maybe with a slight fade. I decided to try the diamana whiteboard 72g x flex shaft and was hitting it perfectly with a slight draw. I am a little confused as to why this turned out that way. I think I am going to purchase the 913d2 with the x flex shaft and I was wondering if that is a stock shaft for the 913d2 or if it is an upcharge. I thought it was a stock shaft considering they had it in the SureFit bag.