At age 68 my Titleist TSi1 with Ascent 40 R flex on Tracman, club head speed was 82-84. Then put Autoflex 305 in, swing weight D0, club head speed went to 92-94. Has anyone tried the Autoflex shaft. Have gained distance 10-15 yards, but more importantly have hit more fairways. That was not the only benefit, learning to swing the Autoflex shaft, must take the club back slowly to allow the shaft to load. This has slowed my take away thru out the bag. Making a much more controlled swing.