I own and have used the Ultra Radical Pearl. It's drilled with the cg between the thumb and finger holes centered to the palm of my hand and the pin is about two inches above and centered above my finger holes. The ball is simply extraordinary. It is skip/flip without equal and I have thrown just about every premium skip/flip ball made or have seen near all in action at one time or another - none approach the power at the breakpoint as the Ultra Radical Pearl. It can handle most lane conditions but will squirt a bit on flooded lanes and there simply isn't enough room to keep it on the lanes if they are toast but, anywhere in between those two conditions, medium dry to medium oily, the Ultra Radical Pearl is a monster. In the right hands, this ball is unstoppable unfortunately for me, I am not that accurate nor do I recognize the changing of the lanes quickly enough and pay the price by getting a split. If you can throw a consistent shot and can follow the oil as it transitions on the lanes, this ball will change your world. For me, the first ball out of my bag is the Pure Tactics simply because it is more forgiving however, when I do throw the Ultra Radical Pearl, people four/five lanes away come down and ask me what I am throwing - it is that impressive.