Could you let us know what you did to the surface? I am torn between the Special Agent and the Thunderstruck Solid, been leaning towards the solid with a surface adjustment, but have not pulled the trigger yet. You can find bowlers that love both, but I don't need both, just need one solid covered ball with a little surface....to finish my arsenal...Great shooting....I have a ton of great scores, but the Sanctioned 300 eludes me.....