Columbia's Warrenty stinks. The biggest reason I did not choose them was they do not warranty any ball that has inserts or slugs. Unless they have changed, they won't replace the ball because they will say that the crack was a result of the glue ised on the inserts. They used to put that disclaimer on the boxes of their balls, BUT they may have changed in the last year, but I doubt it. Hope you can get some satisfaction from them.
Dave
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If You Are Not Using a BuzzSaw, All You Get is SAW-dusted!!