Hey, any OGers ever use these balls, he is a major contributor to the development of the Pro V1, Penta and now is on his own. I ordered a test pack (12 Tour and 12 SUm) which allows you to see which is better. He offered free shipping once you purchase directly from his site and they are cheap. They were featured on mygoflspy and compared well to the big boys. The Tour ball is a 3 piece, the SUM (get me sum) is a 2 piece.