I have a 15lb S&A, drilled RH with a span of 4 13/16 and 4 7/8. The ball has maybe 5 games on it. To see how it is drilled follow this link
http://www.morichbowling.com/Products/Balldrilling.asp It is layed out with a Control drill for a high track with a pap of approx 5 1/2".
The ball is in excellent condition. I am selling for $75 shipped. Take care....JS