Doug,
Did you spin it from both sides of the Determinator? The reason I ask is, is this ball is a z-spinner with I'm guessing a fairly high intermediate diff (like a Hammer no mercy). Spin it again and use the spot between both spin marks as your theoretical mass bias. Also, the mark will probably end up about 5 1/2" from the pin, meaning the pin is not the really the low RG axis on the ball. Go 6 3/4" from the mb mark thru the pin and thats probably close to where the low RG axis is. Then layout with your desired layout, hopefully the CG will fall somewhere decent. For anyone that has drilled one and it rolls like a turd- try a huge p4 balance hole, I was actually able to get one to spin on it's y-axis and it rolled much better than without the hole.
Not to bash Lane 1, but this ball should never had made it out of testing stages because most pro shops don't have the tools necessary to drill this. You must have a Determinator or you are just guessing on this one.
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Gebhardts Bowing & Billiards
1010 Airport Road
Allentown, PA 18109
610-439-8464