I have a 907D2... yes rather out of date but still goes pretty well. (Un)fortunately I bumped in to a demo day and hit the 915 series.... the 907 will shortly be on ebay!
What I'm trying to establish is the characteristics of the shaft I have in the 907D2, so I can compare to the available shafts (see below extract from titleist publication) for the 915 series. Same applies for the fairway wood. If anybody could point me in the right direction that would be fantastic. Perhaps there is a website out there somewhere where one can compare these older shafts...
907 D2 9.5deg; Aldida "exclusively for Titleist" shaft ; flex S; wt 67; tip freq 821; butt freq 255; torque 3.90
906F4 15.5deg; Aldida "exclusively for Titleist" shaft ; flex S; wt 75; tip freq 827; butt freq 258; torque 3.90