Back in the early years of Bowling This Month magazine, there was a series of articles on layouts. I don't recall the author's name but he used a degree layout system using a line from the pin through the cg (I don't think there were many asymetrical balls back then). The cg at 3 o'clock to the pin would be 0 degrees, at 6 o'clock is 90 degrees, 9 o'clock is 180 degrees and 12 o'clock is 270 degrees (for right handers and opposite way around the clock for lefties). 360 degrees is a full circle.
One of the layouts he advocated was 315 degrees. It called for a short pin ball and the cg actually ends up above and to the right (for righties) of the pin. The weight hole usually ends up above and right of the ring finger (depending on chosen pin to PAP distance).
For those who remember the Columbia Aftershock, I drilled a new one with a standard layout and never liked it. I eventually plugged it and went with a 315 degree layout, including hole above fingers, and loved it.
