Just did a swing analysis @ Golftec. Running a special - 1 hour for $99. Besides the fact that I knew I was swinging over the top, my biggest issue has been struggling with my irons. Been better this year, but seriously lacking in distance.
Anyway, he tweaked my grip ever so slightly (strengthened my left hand, weakened my right)....BAM. 15-20 yes added to my 6 iron. Used to be my 140 yd club and I was hitting it 155-160. More importantly, my weak fade / slice was gone. Ball was going dead straight or even *gasp* had a bit of a draw.
Highly recommend seeing if there is a GolfTec near you....best $99 I have ever spent on golf.