Thanks again guys,
I ended up drilling a 4x3.25 mb, pin even with ring and close to val. My customer has about a 325 rev rate but he throws it at about 19-20. On heavy, he still had to slow down some or the ball didn't get to create enough friction. Once he slowed down to about 18, the ball got into a very nice roll and finished very nicely. Pretty nice ball, we've gone through almost every soft ball you could think of and layout to pull up because of his speed and this is one of the better ones. Thanks for all your help...anytime I can return the gesture, feel free to contact me personally.
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Rick Leong
Ten Pins Pro Shop
Track Pro Shop Staff
Vise Grip Staff