Had my driver shaved to.890 face thickness. When fitted for my new Ping G driver my average speed was 88mph. I stayed one step below the max to preserve the integrity of the face and the results are still phenomenal! I’ve gained 25-30 yards on every drive.I’m old enough to play the senior tees but the group I play with say no. I’m right up there with them now. Glad I found you guys!