Just a note on the urethane as a spare ball. I bought the original natural for the same conditions guys are still getting them for. I discovered quickly that it was a better spare ball than my plastic. As Riggs say, the polyester is just too squirty on todays oils, but then occasionally you get flip on the back. Urethane gives me a smooth early move that is not too big, then totally tame on the back end. My percentage on 3-10, 3-6, and 3-6-10 all went up. I even like it better on bucket combinations.