Why did all tournaments stop using the Sardo Rack? Were there issues with it? Does it do what it says it will do (perfect rack)? Are the dimples it puts it the cloth permanent? I have the Delta-13. It's a lot better than the wood or plastic racks, but not perfect. One more question. If all the Sardo Rack does is dimple the cloth, can't I just tap the balls to make my own dimples. Sorry for all the questions, but I have a birthday coming up and I'm running out of things I need at my age. Thank you.