Is there any way to tell whether my driver is cracked or damaged in some way if it's not visible? I have the 909D3 and recently even when I hit it on the center of the club face it doesn't feel solid, and my distance has been significantly reduced (50-60 yds). At first I thought it was because I was just swinging poorly, which is often the case, but after a couple sessions on the range I'm thinking something might be wrong. It feels like there's no bounce/spring off the face and the sound it makes on impact is now a dull "thud".