Got a used Roto Grip Saturn from my good friend, DP3. He said he was taking a sabbatical and cleaning out his closet. I never re-drilled the ball because it fit my span perfectly. I thought this ball was going to be a light oil, to dry, condition specific piece, but I loved this ball so much on all conditions, I hunted down two more on E-Bay, and now have quite the arsenal, with a few surface changes. Love this ball. The Planet Series was vastly underrated!