Just a thought: I have a ball that wasn't reacting the way I thought it ought to, certainly not like the mfg and reviews said. Multiple surfacing options didn't help, so I re-drilled with a different layout and had the ball returned to OOB. More surface tweakings later, I was still disappointed and looking for reasons. My exasperated (and certified) pro-shop guy finally gave up and said, "Sometimes the bowler and the ball just don't match up." I set the ball aside for a year. Then I mentioned all this to another bowler in a casual conversation, and she convinced me none of this made any sense.
It turned out THIS BALL HAD NEVER BEEN BALANCED CORRECTLY. Today, it's my most trusted, most predictable, most appreciated league ball. GEESCH!
Recommendation: If you're in the Denver area, try John Fisher's Bowler's Garage at Crown Lanes, 720-273-8469.