Different driils or different drill bits?

Not trying to start anything here.  I see more posts on the message boards about 900 global / AMF stuff cracking.  I've had my share of them believe me.  Now I know the shells of their stuff is not very thick.  I've been told thickness does not have anything to do with it.  We've agreed to disagree.  They have indicated they have done extensive testing about cover thickness.  Lets see, if a bone is thin it will more than likely crack easier and faster than a bone that's thick.  I know my pro shop very well and I know he takes care of the bits as well as speed.  I've only had 900 Global / AMF crack on me.  That's all I throw too.  I'm still loyal to them. 

I definitely want the Cobra.  Bull Whip would be better for me though at where I bowl.  I want to pull the trigger on these but I want to be able to have equipment I can throw in PBA competition. 

Not trying to start anything here.  I see more posts on the message boards about 900 global / AMF stuff cracking.  I've had my share of them believe me.  Now I know the shells of their stuff is not very thick.  I've been told thickness does not have anything to do with it.  We've agreed to disagree.  They have indicated they have done extensive testing about cover thickness.  Lets see, if a bone is thin it will more than likely crack easier and faster than a bone that's thick.  I know my pro shop very well and I know he takes care of the bits as well as speed.  I've only had 900 Global / AMF crack on me.  That's all I throw too.  I'm still loyal to them. 

1/2" to 5/8" is fairly standard for cover thickness across the board. Are theirs significantly thinner?

I still have not had one crack, but then again when I glue inserts in I glue then to the filler not the cover stock, and use a heavy bevel.

No issues with drills (fingers). I use inserts. I just believe its the ball. None of my other 900/AMF balls have done this. Tempted to get another Grip, but will pass. Twice if learned, third time won't happen....9

How long have you had it? Contact Eric about warranty?

Thanks Storm. Made the call and the ball will be replaced....9